]> err.no Git - linux-2.6/commit
[PATCH] mm: arch do_page_fault() vs in_atomic()
authorPeter Zijlstra <a.p.zijlstra@chello.nl>
Thu, 7 Dec 2006 04:32:18 +0000 (20:32 -0800)
committerLinus Torvalds <torvalds@woody.osdl.org>
Thu, 7 Dec 2006 16:39:21 +0000 (08:39 -0800)
commit6edaf68a87d17570790fd55f0c451a29ec1d6703
tree8ea1f3509dcf3e721919471dea67ef55a3aff78f
parent3395ee0588795b0b3bd889c260e55959cf2b61f5
[PATCH] mm: arch do_page_fault() vs in_atomic()

In light of the recent pagefault and filemap_copy_from_user work I've gone
through all the arch pagefault handlers to make sure the inc_preempt_count()
'feature' works as expected.

Several sections of code (including the new filemap_copy_from_user) rely on
the fact that faults do not take locks under increased preempt count.

arch/x86_64 - good
arch/powerpc - good
arch/cris - fixed
arch/i386 - good
arch/parisc - fixed
arch/sh - good
arch/sparc - good
arch/s390 - good
arch/m68k - fixed
arch/ppc - good
arch/alpha - fixed
arch/mips - good
arch/sparc64 - good
arch/ia64 - good
arch/arm - fixed
arch/um - good
arch/avr32 - good
arch/h8300 - NA
arch/m32r - good
arch/v850 - good
arch/frv - fixed
arch/m68knommu - NA
arch/arm26 - fixed
arch/sh64 - fixed
arch/xtensa - good

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
arch/alpha/mm/fault.c
arch/arm/mm/fault.c
arch/arm26/mm/fault.c
arch/cris/mm/fault.c
arch/frv/mm/fault.c
arch/m68k/mm/fault.c
arch/parisc/mm/fault.c
arch/sh64/mm/fault.c