diff options
| author | Andrey Konovalov <andrey.konovalov@linaro.org> | 2013-05-05 02:40:36 +0400 |
|---|---|---|
| committer | Andrey Konovalov <andrey.konovalov@linaro.org> | 2013-05-05 02:40:36 +0400 |
| commit | 314864b5a538c5ec1f871d814974edc37bdc676e (patch) | |
| tree | f0d341e6eae1cd5c4ca6180aeb29a00e21ff8a8e /arch/arm/mm/fault.c | |
| parent | e5f042c6edebec55bb20a5e399f892766ac65411 (diff) | |
| parent | 8417d689429075fe59d92af4036e25424b13ea9c (diff) | |
Merge branch 'tracking-integration-linux-vexpress' into merge-linux-linaro-lsklsk-20130505.0
Diffstat (limited to 'arch/arm/mm/fault.c')
| -rw-r--r-- | arch/arm/mm/fault.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index 5dbf13f954f..e207aa5f846 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -446,8 +446,16 @@ do_translation_fault(unsigned long addr, unsigned int fsr, if (pud_none(*pud_k)) goto bad_area; - if (!pud_present(*pud)) + if (!pud_present(*pud)) { set_pud(pud, *pud_k); + /* + * There is a small window during free_pgtables() where the + * user *pud entry is 0 but the TLB has not been invalidated + * and we get a level 2 (pmd) translation fault caused by the + * intermediate TLB caching of the old level 1 (pud) entry. + */ + flush_tlb_kernel_page(addr); + } pmd = pmd_offset(pud, addr); pmd_k = pmd_offset(pud_k, addr); @@ -470,8 +478,9 @@ do_translation_fault(unsigned long addr, unsigned int fsr, #endif if (pmd_none(pmd_k[index])) goto bad_area; + if (!pmd_present(pmd[index])) + copy_pmd(pmd, pmd_k); - copy_pmd(pmd, pmd_k); return 0; bad_area: |