Merge branch 'for-2.6.26' of master.kernel.org:/pub/scm/linux/kernel/git/jwboyer...

[linux-2.6] / arch / sparc / mm / fault.c

diff --git a/arch/sparc/mm/fault.c b/arch/sparc/mm/fault.c
index 9eeed3347df3297f4790ff8a7f39b73fa4a38f6e..abd50795a7b614a408c1ef950f2de9213b76d2c0 100644 (file)
--- a/arch/sparc/mm/fault.c
+++ b/arch/sparc/mm/fault.c
@@ -18,9 +18,9 @@
 #include <linux/signal.h>
 #include <linux/mm.h>
 #include <linux/smp.h>
-#include <linux/smp_lock.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
+#include <linux/kdebug.h>
 
 #include <asm/system.h>
 #include <asm/page.h>
@@ -30,7 +30,6 @@
 #include <asm/oplib.h>
 #include <asm/smp.h>
 #include <asm/traps.h>
-#include <asm/kdebug.h>
 #include <asm/uaccess.h>
 
 extern int prom_node_root;
@@ -48,64 +47,15 @@ int vac_size, vac_linesize, vac_do_hw_vac_flushes;
 int vac_entries_per_context, vac_entries_per_segment;
 int vac_entries_per_page;
 
-/* Nice, simple, prom library does all the sweating for us. ;) */
-int prom_probe_memory (void)
+/* Return how much physical memory we have.  */
+unsigned long probe_memory(void)
 {
-       register struct linux_mlist_v0 *mlist;
-       register unsigned long bytes, base_paddr, tally;
-       register int i;
-
-       i = 0;
-       mlist= *prom_meminfo()->v0_available;
-       bytes = tally = mlist->num_bytes;
-       base_paddr = (unsigned long) mlist->start_adr;
-  
-       sp_banks[0].base_addr = base_paddr;
-       sp_banks[0].num_bytes = bytes;
-
-       while (mlist->theres_more != (void *) 0){
-               i++;
-               mlist = mlist->theres_more;
-               bytes = mlist->num_bytes;
-               tally += bytes;
-               if (i > SPARC_PHYS_BANKS-1) {
-                       printk ("The machine has more banks than "
-                               "this kernel can support\n"
-                               "Increase the SPARC_PHYS_BANKS "
-                               "setting (currently %d)\n",
-                               SPARC_PHYS_BANKS);
-                       i = SPARC_PHYS_BANKS-1;
-                       break;
-               }
-    
-               sp_banks[i].base_addr = (unsigned long) mlist->start_adr;
-               sp_banks[i].num_bytes = mlist->num_bytes;
-       }
-
-       i++;
-       sp_banks[i].base_addr = 0xdeadbeef;
-       sp_banks[i].num_bytes = 0;
-
-       /* Now mask all bank sizes on a page boundary, it is all we can
-        * use anyways.
-        */
-       for(i=0; sp_banks[i].num_bytes != 0; i++)
-               sp_banks[i].num_bytes &= PAGE_MASK;
-
-       return tally;
-}
-
-/* Traverse the memory lists in the prom to see how much physical we
- * have.
- */
-unsigned long
-probe_memory(void)
-{
-       int total;
+       unsigned long total = 0;
+       int i;
 
-       total = prom_probe_memory();
+       for (i = 0; sp_banks[i].num_bytes; i++)
+               total += sp_banks[i].num_bytes;
 
-       /* Oh man, much nicer, keep the dirt in promlib. */
        return total;
 }
 
@@ -227,6 +177,7 @@ asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,
        unsigned long g2;
        siginfo_t info;
        int from_user = !(regs->psr & PSR_PS);
+       int fault;
 
        if(text_fault)
                address = regs->pc;
@@ -290,19 +241,18 @@ good_area:
         * make sure we exit gracefully rather than endlessly redo
         * the fault.
         */
-       switch (handle_mm_fault(mm, vma, address, write)) {
-       case VM_FAULT_SIGBUS:
-               goto do_sigbus;
-       case VM_FAULT_OOM:
-               goto out_of_memory;
-       case VM_FAULT_MAJOR:
+       fault = handle_mm_fault(mm, vma, address, write);
+       if (unlikely(fault & VM_FAULT_ERROR)) {
+               if (fault & VM_FAULT_OOM)
+                       goto out_of_memory;
+               else if (fault & VM_FAULT_SIGBUS)
+                       goto do_sigbus;
+               BUG();
+       }
+       if (fault & VM_FAULT_MAJOR)
                current->maj_flt++;
-               break;
-       case VM_FAULT_MINOR:
-       default:
+       else
                current->min_flt++;
-               break;
-       }
        up_read(&mm->mmap_sem);
        return;
 
@@ -370,7 +320,7 @@ out_of_memory:
        up_read(&mm->mmap_sem);
        printk("VM: killing process %s\n", tsk->comm);
        if (from_user)
-               do_exit(SIGKILL);
+               do_group_exit(SIGKILL);
        goto no_context;
 
 do_sigbus: