[clameter: rediffed against Pekka's cleanup patch, omitted
moves of the name of a function to the start of line] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Christoph Lameter <clameter@sgi.com>
The statistics provided here allow the monitoring of allocator behavior but
at the cost of some (minimal) loss of performance. Counters are placed in
SLUB's per cpu data structure. The per cpu structure may be extended by the
statistics to grow larger than one cacheline which will increase the cache
footprint of SLUB.
There is a compile option to enable/disable the inclusion of the runtime
statistics and its off by default.
The slabinfo tool is enhanced to support these statistics via two options:
-D Switches the line of information displayed for a slab from size
mode to activity mode.
-A Sorts the slabs displayed by activity. This allows the display of
the slabs most important to the performance of a certain load.
-r Report option will report detailed statistics on
Total: The total number of allocation and frees that occurred for a
slab
Fastpath: The number of allocations/frees that used the fastpath.
Slowpath: Other allocations
Page Alloc: Number of calls to the page allocator as a result of slowpath
processing
Add Partial: Number of slabs added to the partial list through free or
alloc (occurs during cpuslab flushes)
Remove Partial: Number of slabs removed from the partial list as a result of
allocations retrieving a partial slab or by a free freeing
the last object of a slab.
RemoteObj/Froz: How many times were remotely freed object encountered when a
slab was about to be deactivated. Frozen: How many times was
free able to skip list processing because the slab was in use
as the cpuslab of another processor.
Flushes: Number of times the cpuslab was flushed on request
(kmem_cache_shrink, may result from races in __slab_alloc)
Refill: Number of times we were able to refill the cpuslab from
remotely freed objects for the same slab.
Deactivate: Statistics how slabs were deactivated. Shows how they were
put onto the partial list.
In general fastpath is very good. Slowpath without partial list processing is
also desirable. Any touching of partial list uses node specific locks which
may potentially cause list lock contention.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Provide an alternate implementation of the SLUB fast paths for alloc
and free using cmpxchg_local. The cmpxchg_local fast path is selected
for arches that have CONFIG_FAST_CMPXCHG_LOCAL set. An arch should only
set CONFIG_FAST_CMPXCHG_LOCAL if the cmpxchg_local is faster than an
interrupt enable/disable sequence. This is known to be true for both
x86 platforms so set FAST_CMPXCHG_LOCAL for both arches.
Currently another requirement for the fastpath is that the kernel is
compiled without preemption. The restriction will go away with the
introduction of a new per cpu allocator and new per cpu operations.
The advantages of a cmpxchg_local based fast path are:
1. Potentially lower cycle count (30%-60% faster)
2. There is no need to disable and enable interrupts on the fast path.
Currently interrupts have to be disabled and enabled on every
slab operation. This is likely avoiding a significant percentage
of interrupt off / on sequences in the kernel.
3. The disposal of freed slabs can occur with interrupts enabled.
The alternate path is realized using #ifdef's. Several attempts to do the
same with macros and inline functions resulted in a mess (in particular due
to the strange way that local_interrupt_save() handles its argument and due
to the need to define macros/functions that sometimes disable interrupts
and sometimes do something else).
[clameter: Stripped preempt bits and disabled fastpath if preempt is enabled] Signed-off-by: Christoph Lameter <clameter@sgi.com> Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
We use a NULL pointer on freelists to signal that there are no more objects.
However the NULL pointers of all slabs match in contrast to the pointers to
the real objects which are in different ranges for different slab pages.
Change the end pointer to be a pointer to the first object and set bit 0.
Every slab will then have a different end pointer. This is necessary to ensure
that end markers can be matched to the source slab during cmpxchg_local.
Bring back the use of the mapping field by SLUB since we would otherwise have
to call a relatively expensive function page_address() in __slab_alloc(). Use
of the mapping field allows avoiding a call to page_address() in various other
functions as well.
There is no need to change the page_mapping() function since bit 0 is set on
the mapping as also for anonymous pages. page_mapping(slab_page) will
therefore still return NULL although the mapping field is overloaded.
Signed-off-by: Christoph Lameter <clameter@sgi.com> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
gcc 4.2 spits out an annoying warning if one casts a const void *
pointer to a void * pointer. No warning is generated if the
conversion is done through an assignment.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SPARC32]: Use regsets in arch_ptrace().
[SPARC64]: Use regsets in arch_ptrace().
[SPARC32]: Use regsets for ELF core dumping.
[SPARC64]: Use regsets for ELF core dumping.
[SPARC64]: Remove unintentional ptrace debugging messages.
[SPARC]: Move over to arch_ptrace().
[SPARC]: Remove PTRACE_SUN* handling.
[SPARC]: Kill DEBUG_PTRACE code.
[SPARC32]: Add user regset support.
[SPARC64]: Add user regsets.
[SPARC64]: Fix booting on non-zero cpu.
Linus Torvalds [Thu, 7 Feb 2008 18:20:31 +0000 (10:20 -0800)]
Merge git://git.infradead.org/mtd-2.6
* git://git.infradead.org/mtd-2.6: (120 commits)
[MTD] Fix mtdoops.c compilation
[MTD] [NOR] fix startup lock when using multiple nor flash chips
[MTD] [DOC200x] eccbuf is statically defined and always evaluate to true
[MTD] Fix maps/physmap.c compilation with CONFIG_PM
[MTD] onenand: Add panic_write function to the onenand driver
[MTD] mtdoops: Use the panic_write function when present
[MTD] Add mtd panic_write function pointer
[MTD] [NAND] Freescale enhanced Local Bus Controller FCM NAND support.
[MTD] physmap.c: Add support for multiple resources
[MTD] [NAND] Fix misparenthesization introduced by commit 78b65179...
[MTD] [NAND] Fix Blackfin NFC ECC calculating bug with page size 512 bytes
[MTD] [NAND] Remove wrong operation in PM function of the BF54x NFC driver
[MTD] [NAND] Remove unused variable in plat_nand_remove
[MTD] Unlocking all Intel flash that is locked on power up.
[MTD] [NAND] at91_nand: Make mtdparts option can override board info
[MTD] mtdoops: Various minor cleanups
[MTD] mtdoops: Ensure sequential write to the buffer
[MTD] mtdoops: Perform write operations in a workqueue
[MTD] mtdoops: Add further error return code checking
[MTD] [NOR] Test devtype, not definition in flash_probe(), drivers/mtd/devices/lart.c
...
Linus Torvalds [Thu, 7 Feb 2008 17:45:14 +0000 (09:45 -0800)]
Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds
* 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds:
leds: Add HP Jornada 6xx driver
leds: Remove the now uneeded ixp4xx driver
leds: Add power LED to the wrap driver
leds: Fix led-gpio active_low default brightness
leds: hw acceleration for Clevo mail LED driver
leds: Add support for hardware accelerated LED flashing
leds: Standardise LED naming scheme
leds: Add clevo notebook LED driver
The recently introduced page walker (walk_page_range()) calls pgd_offset with a
const struct mm_struct pointer, causing the following compile warning on m68k:
mm/pagewalk.c:111: warning: passing argument 1 of 'pgd_offset' discards qualifiers from pointer target type
Make the `mm' parameter of the inline function pgd_offset() const to shut it
up.
Linus Torvalds [Thu, 7 Feb 2008 17:07:16 +0000 (09:07 -0800)]
Merge branch 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (22 commits)
drm: add initial r500 drm support
radeon: setup the ring buffer fetcher to be less agressive.
drm: fixup some of the ioctl function exit paths
drm: the drm really should call pci_set_master..
i915: Add chipset id for Intel Integrated Graphics Device
drm: cleanup DRM_DEBUG() parameters
drm/i915: add support for E7221 chipset
drm: don't cast a pointer to pointer of list_head
mga_dma: return 'err' not just zero from mga_do_cleanup_dma()
drm: add _DRM_DRIVER flag, and re-order unload.
drm: enable udev node creation
drm: Make DRM_IOCTL_GET_CLIENT return EINVAL when it can't find client #idx.
drm: move drm_mem_init to proper place in startup sequence
drm: call driver load function after initialising AGP
drm: Fix ioc32 compat layer
drm: fd.o bug #11895: Only add the AGP base to map offset if the caller didn't.
i915: add suspend/resume support
drm: update DRM sysfs support
drm: Initialize the AGP structure's base address at init rather than enable.
drm: move two function extern into the correct block
...
* git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
[CPUFREQ] Add missing printk levels to e_powersaver
[CPUFREQ] Fix sparse warning in powernow-k8
[CPUFREQ] Support Model D parts and newer in e_powersaver
[CPUFREQ] Powernow-k8: Update to support the latest Turion processors
[CPUFREQ] fix configuration help message
[CPUFREQ] powernow-k8 print pstate instead of fid/did for family 10h
[CPUFREQ] Eliminate cpufreq_userspace scaling_setspeed deadlock
[CPUFREQ] gx-suspmod.c: use boot_cpu_data instead of current_cpu_data
[CPUFREQ] fix incorrect comment on show_available_freqs() in freq_table.c
[CPUFREQ] drivers/cpufreq: Add missing "space"
[CPUFREQ] arch/x86: Add missing "space"
[CPUFREQ] Remove pointless Kconfig dependancy
Jiri Slaby [Thu, 7 Feb 2008 08:16:45 +0000 (00:16 -0800)]
Char: mxser, ioctl cleanup
- remove dead MOXA_GET_CONF (always returned -ENXIO)
- remove useless MOXA_GET_CUMAJOR (unused)
- use get/put_user instead of copy_from/to_user for simple types
- cleanup TIOCMIWAIT -- return -ERESTARTSYS on signal, move condition into
separate function
Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Reviewed-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jiri Slaby [Thu, 7 Feb 2008 08:16:42 +0000 (00:16 -0800)]
Char: mxser, remove special baudrate processing
Let the special baudrate processing on the tty layer. Also remove
set/get_special_rate ioctls introduced in commit f64c84a1668930d1ca2b7dbaa92146c2139cb508, since it is no longer needed.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Reviewed-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jiri Slaby [Thu, 7 Feb 2008 08:16:40 +0000 (00:16 -0800)]
Char: serial167, remove bottomhalf
- Cy_EVENT_OPEN_WAKEUP is simple wake_up
- Cy_EVENT_HANGUP is wake_up + tty_hangup, which schedules its own work
- Cy_EVENT_WRITE_WAKEUP is tty_wakeup which may be called directly too
Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jiri Slaby [Thu, 7 Feb 2008 08:16:39 +0000 (00:16 -0800)]
Char: stallion, remove bottomhalf
- tty_hangup schedules a bottomhalf itself, tty_wakeup doesn't need it
- call the CD code (part of work handler previously) directly from the code
(it wakes somebody up or calls tty_hangup at worse)
Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jiri Slaby [Thu, 7 Feb 2008 08:16:36 +0000 (00:16 -0800)]
Char: stallion, fix compiler warnings
Don't emit warnings on 64 bit platforms from min(). sizeof() on those
is not uint, neither 2 pointers difference, cast it to uint by min_t in
both cases.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Jiri Slaby [Thu, 7 Feb 2008 08:16:33 +0000 (00:16 -0800)]
Char: rocket, printk cleanup
- add KERN_ level to each print
- change some levels appropriately
- add \n at the ends where missing
- change two complex printks into dev_info, where the original info is
printed automatically
Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Frank Sorenson [Thu, 7 Feb 2008 08:16:31 +0000 (00:16 -0800)]
i8k: Inspiron E1705 fix
Needs the following in order to work correctly on my Inspiron E1705:
Add DMI Product name to i8k for Dell MP061 hardware (Inspiron 9400/E1705)
Signed-off-by: Frank Sorenson <frank@tuxrocks.com> Cc: Bradley Smith <bradjsmith@btinternet.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Bradley Smith [Thu, 7 Feb 2008 08:16:30 +0000 (00:16 -0800)]
I8K: add i8k driver to the x86_64 Kconfig
Adds i8k driver to the x86_64 Kconfig.
Signed-off-by: Bradley Smith <bradjsmith@btinternet.com> Cc: Frank Sorenson <frank@tuxrocks.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Bradley Smith [Thu, 7 Feb 2008 08:16:27 +0000 (00:16 -0800)]
I8K: allow i8k driver to be built on x86_64 systems
Adds #if clause and additional inline assembly so that the driver
builds on x86_64 systems.
Signed-off-by: Bradley Smith <bradjsmith@btinternet.com> Cc: Frank Sorenson <frank@tuxrocks.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add cmpxchg_local to sparc, move __cmpxchg to system.h
Move cmpxchg and add cmpxchg_local to system.h.
Use the new generic cmpxchg_local (disables interrupt).
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Gunnar Larisch [Thu, 7 Feb 2008 08:16:22 +0000 (00:16 -0800)]
Add cmpxchg_local to ppc
Add a local processor version of cmpxchg for ppc.
Implements __cmpxchg_u32_local and uses it for 32 bits cmpxchg_local.
It uses the non NMI safe cmpxchg_local_generic for 1, 2 and 8 bytes
cmpxchg_local.
Signed-off-by: Gunnar Larisch <gl@denx.de> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Kumar Gala <galak@gate.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch is for Mathieu Desnoyers's include/asm-m32r/local.h.
Applying the new include/asm-m32r/local.h, inclusion of linux/sched.h
is needed to fix a build error of arch/m32r/kernel/smpboot.c.
<-- snip -->
...
CC arch/m32r/kernel/smpboot.o
/project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c: In function 'do_boot_cpu':
/project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:279: error: implicit declaration of function 'fork_idle'
/project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:279: warning: assignment makes pointer from integer without a cast
/project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:283: error: dereferencing pointer to incomplete type
/project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:289: error: dereferencing pointer to incomplete type
/project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:290: error: implicit declaration of function 'task_thread_info'
/project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:290: error: invalid type argument of '->'
/project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c: In function 'start_secondary':
/project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:429: error: implicit declaration of function 'cpu_init'
make[2]: *** [arch/m32r/kernel/smpboot.o] Error 1
<-- snip -->
the #endif /* CONFIG_SMP */ should cover the default condition, or it may cause
bad parameter to be silently missed.
To make it work correctly, we have to remove the ifdef CONFIG SMP surrounding
__xchg_called_with_bad_pointer declaration. Thanks to Adrian Bunk for detecting
this.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by: Hirokazu Takata <takata@linux-m32r.org> Cc: Adrian Bunk <bunk@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
cmpxchg_local and cmpxchg64_local will use the architecture specific
__cmpxchg_local_u32 for 32 bits arguments, and use the generic
__cmpxchg_local_generic for 8, 16 and 64 bits arguments.
Add cmpxchg_local, cmpxchg64 and cmpxchg64_local to ia64
Add the primitives cmpxchg_local, cmpxchg64 and cmpxchg64_local to ia64. They
use cmpxchg_acq as underlying macro, just like the already existing ia64
cmpxchg().
Changelog:
ia64 cmpxchg_local coding style fix
Quoting Keith Owens:
Which makes it absolutely clear that they are the same code. With your
patch, humans have to do a string compare of two defines to see if they
are the same.
Note cmpxchg is *not* a performance win vs interrupt disable / enable on IA64.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by: Christoph Lameter <clameter@sgi.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Keith Owens <kaos@ocs.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Use the new generic cmpxchg_local (disables interrupt) for 8, 16 and 64 bits
arguments. Use the 32 bits cmpxchg available on the architecture for 32 bits
arguments.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add cmpxchg_local to blackfin, replace __cmpxchg by generic cmpxchg
Use the new generic cmpxchg_local (disables interrupt). Also use the generic
cmpxchg as fallback if SMP is not set since nobody seems to know why __cmpxchg
has been implemented in assembly in the first place thather than in plain C.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Michael Frysinger <michael.frysinger@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add cmpxchg_local to asm-generic for per cpu atomic operations
Emulates the cmpxchg_local by disabling interrupts around variable modification.
This is not reentrant wrt NMIs and MCEs. It is only protected against normal
interrupts, but this is enough for architectures without such interrupt sources
or if used in a context where the data is not shared with such handlers.
It can be used as a fallback for architectures lacking a real cmpxchg
instruction.
For architectures that have a real cmpxchg but does not have NMIs or MCE,
testing which of the generic vs architecture specific cmpxchg is the fastest
should be done.
asm-generic/cmpxchg.h defines a cmpxchg that uses cmpxchg_local. It is meant to
be used as a cmpxchg fallback for architectures that do not support SMP.
* Patch series comments
Using cmpxchg_local shows a performance improvements of the fast path goes from
a 66% speedup on a Pentium 4 to a 14% speedup on AMD64.
In detail:
Tested-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Measurements on a Pentium4, 3GHz, Hyperthread.
SLUB Performance testing
========================
1. Kmalloc: Repeatedly allocate then free test
Tested-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Measurements on a AMD64 2.0 GHz dual-core
In this test, we seem to remove 10 cycles from the kmalloc fast path.
On small allocations, it gives a 14% performance increase. kfree fast
path also seems to have a 10 cycles improvement.
H. Peter Anvin [Thu, 7 Feb 2008 08:15:57 +0000 (00:15 -0800)]
Sanitize the type of struct user.u_ar0
struct user.u_ar0 is defined to contain a pointer offset on all
architectures in which it is defined (all architectures which define an
a.out format except SPARC.) However, it has a pointer type in the headers,
which is pointless -- <asm/user.h> is not exported to userspace, and it
just makes the code messy.
Redefine the field as "unsigned long" (which is the same size as a pointer
on all Linux architectures) and change the setting code to user offsetof()
instead of hand-coded arithmetic.
Cc: Linux Arch Mailing List <linux-arch@vger.kernel.org> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Lennert Buytenhek <kernel@wantstofly.org> Cc: Håvard Skinnemoen <hskinnemoen@atmel.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Tony Luck <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Do not export asm/user.h and linux/user.h during make headers_install.
Signed-off-by: Kirill A. Shutemov <k.shutemov@gmail.com> Reviewed-by: David Woodhouse <dwmw2@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:52 +0000 (00:15 -0800)]
iget: remove iget() and the read_inode() super op as being obsolete
Remove the old iget() call and the read_inode() superblock operation it uses
as these are really obsolete, and the use of read_inode() does not produce
proper error handling (no distinction between ENOMEM and EIO when marking an
inode bad).
Furthermore, this removes the temptation to use iget() to find an inode by
number in a filesystem from code outside that filesystem.
iget_locked() should be used instead. A new function is added in an earlier
patch (iget_failed) that is to be called to mark an inode as bad, unlock it
and release it should the get routine fail. Mark iget() and read_inode() as
being obsolete and remove references to them from the documentation.
Typically a filesystem will be modified such that the read_inode function
becomes an internal iget function, for example the following:
David Howells [Thu, 7 Feb 2008 08:15:51 +0000 (00:15 -0800)]
iget: stop HPPFS from using iget() and read_inode()
Stop the HPPFS filesystem from using iget() and read_inode(). Provide an
hppfs_iget(), and call that instead of iget(). hppfs_iget() then uses
iget_locked() directly and returns a proper error code instead of an inode in
the event of an error.
hppfs_fill_sb_common() returns any error incurred when getting the root inode
instead of EINVAL.
Note that the contents of hppfs_kern.c need to be examined:
(*) The HPPFS inode retains a pointer to the proc dentry it is shadowing, but
whilst it does appear to retain a reference to it, it doesn't appear to
destroy the reference if the inode goes away.
(*) hppfs_iget() should perhaps subsume init_inode() and hppfs_read_inode().
(*) It would appear that all hppfs inodes are the same inode because iget()
was being called with inode number 0, which forms the lookup key.
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:50 +0000 (00:15 -0800)]
iget: stop HOSTFS from using iget() and read_inode()
Stop the HOSTFS filesystem from using iget() and read_inode(). Provide
hostfs_iget(), and call that instead of iget(). hostfs_iget() then uses
iget_locked() directly and returns a proper error code instead of an inode in
the event of an error.
hostfs_fill_sb_common() returns any error incurred when getting the root inode
instead of EINVAL.
Note that the contents of hostfs_kern.c need to be examined:
(*) hostfs_iget() should perhaps subsume init_inode() and hostfs_read_inode().
(*) It would appear that all hostfs inodes are the same inode because iget()
was being called with inode number 0 - which forms the lookup key.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Cc: Jeff Dike <jdike@addtoit.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:49 +0000 (00:15 -0800)]
iget: stop OPENPROMFS from using iget() and read_inode()
Stop the OPENPROMFS filesystem from using iget() and read_inode(). Replace
openpromfs_read_inode() with openpromfs_iget(), and call that instead of
iget(). openpromfs_iget() then uses iget_locked() directly and returns a
proper error code instead of an inode in the event of an error.
openpromfs_fill_super() returns any error incurred when getting the root inode
instead of ENOMEM (not that it currently incurs any other error).
Signed-off-by: David Howells <dhowells@redhat.com> Cc: "David S. Miller" <davem@davemloft.net> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:48 +0000 (00:15 -0800)]
iget: stop UFS from using iget() and read_inode()
Stop the UFS filesystem from using iget() and read_inode(). Replace
ufs_read_inode() with ufs_iget(), and call that instead of iget(). ufs_iget()
then uses iget_locked() directly and returns a proper error code instead of an
inode in the event of an error.
ufs_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Cc: Evgeniy Dushistov <dushistov@mail.ru> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:47 +0000 (00:15 -0800)]
iget: stop the SYSV filesystem from using iget() and read_inode()
Stop the SYSV filesystem from using iget() and read_inode(). Replace
sysv_read_inode() with sysv_iget(), and call that instead of iget().
sysv_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:46 +0000 (00:15 -0800)]
iget: stop ROMFS from using iget() and read_inode()
Stop the ROMFS filesystem from using iget() and read_inode(). Replace
romfs_read_inode() with romfs_iget(), and call that instead of iget().
romfs_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
romfs_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:45 +0000 (00:15 -0800)]
iget: stop QNX4 from using iget() and read_inode()
Stop the QNX4 filesystem from using iget() and read_inode(). Replace
qnx4_read_inode() with qnx4_iget(), and call that instead of iget().
qnx4_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
qnx4_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Cc: Anders Larsen <al@alarsen.net> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:45 +0000 (00:15 -0800)]
iget: stop PROCFS from using iget() and read_inode()
Stop the PROCFS filesystem from using iget() and read_inode(). Merge
procfs_read_inode() into procfs_get_inode(), and have that call iget_locked()
instead of iget().
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:44 +0000 (00:15 -0800)]
iget: stop the MINIX filesystem from using iget() and read_inode()
Stop the MINIX filesystem from using iget() and read_inode(). Replace
minix_read_inode() with minix_iget(), and call that instead of iget().
minix_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
minix_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:43 +0000 (00:15 -0800)]
iget: stop JFS from using iget() and read_inode()
Stop the JFS filesystem from using iget() and read_inode(). Replace
jfs_read_inode() with jfs_iget(), and call that instead of iget(). jfs_iget()
then uses iget_locked() directly and returns a proper error code instead of an
inode in the event of an error.
jfs_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:42 +0000 (00:15 -0800)]
iget: stop JFFS2 from using iget() and read_inode()
Stop the JFFS2 filesystem from using iget() and read_inode(). Replace
jffs2_read_inode() with jffs2_iget(), and call that instead of iget().
jffs2_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
jffs2_do_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
Signed-off-by: David Howells <dhowells@redhat.com> Cc: David Woodhouse <dwmw2@infradead.org> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:41 +0000 (00:15 -0800)]
iget: stop ISOFS from using read_inode()
Stop the ISOFS filesystem from using read_inode(). Make isofs_read_inode()
return an error code, and make isofs_iget() pass it on.
Signed-off-by: David Howells <dhowells@redhat.com> Cc: Jan Kara <jack@ucw.cz> Acked-by: Christoph Hellwig <hch@lst.de> Cc: "Dave Young" <hidave.darkstar@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:40 +0000 (00:15 -0800)]
iget: stop HFSPLUS from using iget() and read_inode()
Stop the HFSPLUS filesystem from using iget() and read_inode(). Replace
hfsplus_read_inode() with hfsplus_iget(), and call that instead of iget().
hfsplus_iget() then uses iget_locked() directly and returns a proper error
code instead of an inode in the event of an error.
hfsplus_fill_super() returns any error incurred when getting the root inode.
Signed-off-by: David Howells <dhowells@redhat.com> Cc: Roman Zippel <zippel@linux-m68k.org> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:39 +0000 (00:15 -0800)]
iget: stop FreeVXFS from using iget() and read_inode()
Stop the FreeVXFS filesystem from using iget() and read_inode(). Replace
vxfs_read_inode() with vxfs_iget(), and call that instead of iget().
vxfs_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
vxfs_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:37 +0000 (00:15 -0800)]
iget: stop EXT4 from using iget() and read_inode()
Stop the EXT4 filesystem from using iget() and read_inode(). Replace
ext4_read_inode() with ext4_iget(), and call that instead of iget().
ext4_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
ext4_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: "Theodore Ts'o" <tytso@mit.edu> Acked-by: Jan Kara <jack@suse.cz> Cc: <linux-ext4@vger.kernel.org> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:36 +0000 (00:15 -0800)]
iget: stop EXT3 from using iget() and read_inode()
Stop the EXT3 filesystem from using iget() and read_inode(). Replace
ext3_read_inode() with ext3_iget(), and call that instead of iget().
ext3_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
ext3_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: "Theodore Ts'o" <tytso@mit.edu> Acked-by: Jan Kara <jack@suse.cz> Cc: <linux-ext4@vger.kernel.org> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:35 +0000 (00:15 -0800)]
iget: stop EXT2 from using iget() and read_inode()
Stop the EXT2 filesystem from using iget() and read_inode(). Replace
ext2_read_inode() with ext2_iget(), and call that instead of iget().
ext2_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
ext2_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: "Theodore Ts'o" <tytso@mit.edu> Cc: <linux-ext4@vger.kernel.org> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:34 +0000 (00:15 -0800)]
iget: stop EFS from using iget() and read_inode()
Stop the EFS filesystem from using iget() and read_inode(). Replace
efs_read_inode() with efs_iget(), and call that instead of iget(). efs_iget()
then uses iget_locked() directly and returns a proper error code instead of an
inode in the event of an error.
efs_fill_super() returns any error incurred when getting the root inode
instead of EACCES.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:33 +0000 (00:15 -0800)]
iget: stop CIFS from using iget() and read_inode()
Stop the CIFS filesystem from using iget() and read_inode(). Replace
cifs_read_inode() with cifs_iget(), and call that instead of iget().
cifs_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
cifs_read_super() now returns any error incurred when getting the root inode
instead of ENOMEM.
cifs_iget() needs examining. The comment "can not call macro FreeXid here
since in a void func" is no longer true.
Signed-off-by: David Howells <dhowells@redhat.com> Cc: Steven French <sfrench@us.ibm.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:32 +0000 (00:15 -0800)]
iget: stop BFS from using iget() and read_inode()
Stop the BFS filesystem from using iget() and read_inode(). Replace
bfs_read_inode() with bfs_iget(), and call that instead of iget(). bfs_iget()
then uses iget_locked() directly and returns a proper error code instead of an
inode in the event of an error.
bfs_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
[kamalesh@linux.vnet.ibm.com: build fix] Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:31 +0000 (00:15 -0800)]
iget: stop BEFS from using iget() and read_inode()
Stop the BEFS filesystem from using iget() and read_inode(). Replace
befs_read_inode() with befs_iget(), and call that instead of iget().
befs_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
befs_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Will Dyson <will_dyson@pobox.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:30 +0000 (00:15 -0800)]
iget: stop autofs from using iget() and read_inode()
Stop the autofs filesystem from using iget() and read_inode(). Replace
autofs_read_inode() with autofs_iget(), and call that instead of iget().
autofs_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
Signed-off-by: David Howells <dhowells@redhat.com> Cc: Ian Kent <raven@themaw.net> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:29 +0000 (00:15 -0800)]
iget: stop AFFS from using iget() and read_inode()
Stop the AFFS filesystem from using iget() and read_inode(). Replace
affs_read_inode() with affs_iget(), and call that instead of iget().
affs_iget() then uses iget_locked() directly and returns a proper error code
instead of an inode in the event of an error.
affs_fill_super() returns any error incurred when getting the root inode
instead of EINVAL.
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: David Howells <dhowells@redhat.com> Cc: Roman Zippel <zippel@linux-m68k.org> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:29 +0000 (00:15 -0800)]
iget: use iget_failed() in GFS2
Use iget_failed() in GFS2 to kill a failed inode.
Signed-off-by: David Howells <dhowells@redhat.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:27 +0000 (00:15 -0800)]
iget: introduce a function to register iget failure
Introduce a function to register failure in an inode construction path. This
includes marking the inode under construction as bad, unlocking it and
releasing it.
Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
David Howells [Thu, 7 Feb 2008 08:15:26 +0000 (00:15 -0800)]
Add an ERR_CAST() function to complement ERR_PTR and co.
Add an ERR_CAST() function to complement ERR_PTR and co. for the purposes
of casting an error entyped as one pointer type to an error of another
pointer type whilst making it explicit as to what is going on.
This provides a replacement for the ERR_PTR(PTR_ERR(p)) construct.
Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
projects / linux-2.6 / log