diff options
| author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-29 11:28:30 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-29 11:28:30 -0800 |
| commit | 76babde121d2ffef04ca692ce64ef9f8a9866086 (patch) | |
| tree | 294923bbb4974258d86d223e35eee691abacdfb1 /arch/powerpc/mm/fault.c | |
| parent | e71ac6032edf77a1e4a81f3e3b260807e94b37a5 (diff) | |
| parent | 15e812ad849e142e3dfc984d33c4d8042389f148 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc
* git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (67 commits)
[PATCH] powerpc: Remove oprofile spinlock backtrace code
[PATCH] powerpc: Add oprofile calltrace support to all powerpc cpus
[PATCH] powerpc: Add oprofile calltrace support
[PATCH] for_each_possible_cpu: ppc
[PATCH] for_each_possible_cpu: powerpc
[PATCH] lock PTE before updating it in 440/BookE page fault handler
[PATCH] powerpc: Kill _machine and hard-coded platform numbers
ppc: Fix compile error in arch/ppc/lib/strcase.c
[PATCH] git-powerpc: WARN was a dumb idea
[PATCH] powerpc: a couple of trivial compile warning fixes
powerpc: remove OCP references
powerpc: Make uImage default build output for MPC8540 ADS
powerpc: move math-emu over to arch/powerpc
powerpc: use memparse() for mem= command line parsing
ppc: fix strncasecmp prototype
[PATCH] powerpc: make ISA floppies work again
[PATCH] powerpc: Fix some initcall return values
[PATCH] powerpc: Workaround for pSeries RTAS bug
[PATCH] spufs: fix __init/__exit annotations
[PATCH] powerpc: add hvc backend for rtas
...
Diffstat (limited to 'arch/powerpc/mm/fault.c')
| -rw-r--r-- | arch/powerpc/mm/fault.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index ec4adcb4bc2..5aea0909a5e 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -267,25 +267,29 @@ good_area: #endif #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE) pte_t *ptep; + pmd_t *pmdp; /* Since 4xx/Book-E supports per-page execute permission, * we lazily flush dcache to icache. */ ptep = NULL; - if (get_pteptr(mm, address, &ptep) && pte_present(*ptep)) { - struct page *page = pte_page(*ptep); - - if (! test_bit(PG_arch_1, &page->flags)) { - flush_dcache_icache_page(page); - set_bit(PG_arch_1, &page->flags); + if (get_pteptr(mm, address, &ptep, &pmdp)) { + spinlock_t *ptl = pte_lockptr(mm, pmdp); + spin_lock(ptl); + if (pte_present(*ptep)) { + struct page *page = pte_page(*ptep); + + if (!test_bit(PG_arch_1, &page->flags)) { + flush_dcache_icache_page(page); + set_bit(PG_arch_1, &page->flags); + } + pte_update(ptep, 0, _PAGE_HWEXEC); + _tlbie(address); + pte_unmap_unlock(ptep, ptl); + up_read(&mm->mmap_sem); + return 0; } - pte_update(ptep, 0, _PAGE_HWEXEC); - _tlbie(address); - pte_unmap(ptep); - up_read(&mm->mmap_sem); - return 0; + pte_unmap_unlock(ptep, ptl); } - if (ptep != NULL) - pte_unmap(ptep); #endif /* a write */ } else if (is_write) { |