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sh: Fix split ptlock for user mappings in __do_page_fault().

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There was a bug that got introduced when the split ptlock changes
went in where mm could be unintialized for user mappings, this
fixes it up..

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2006-09-27 15:30:24 +09:00
parent c470662854
commit f647d33f87
1 changed files with 4 additions and 3 deletions
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7
arch/sh/mm/fault.c
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@@ -210,10 +210,11 @@ asmlinkage int __do_page_fault(struct pt_regs *regs, unsigned long writeaccess,
* are always mapped, whether it be due to legacy behaviour in * are always mapped, whether it be due to legacy behaviour in
* 29-bit mode, or due to PMB configuration in 32-bit mode. * 29-bit mode, or due to PMB configuration in 32-bit mode.
*/ */
if (address >= P3SEG && address < P3_ADDR_MAX) if (address >= P3SEG && address < P3_ADDR_MAX) {
pgd = pgd_offset_k(address); pgd = pgd_offset_k(address);
else { mm = NULL;
if (unlikely(address >= TASK_SIZE || !current->mm)) } else {
if (unlikely(address >= TASK_SIZE || !(mm = current->mm)))
return 1; return 1;
pgd = pgd_offset(current->mm, address); pgd = pgd_offset(current->mm, address);