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authorLinus Torvalds <torvalds@linux-foundation.org>2016-07-02 19:10:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-02 19:10:21 -0700
commit4f302921c1458d790ae21147f7043f4e6b6a1085 (patch)
tree9fd8a727b9971bf5597682b1b211c2c5e2516815 /arch
parent70bd68d7f725b801d62566774d4770601998d03a (diff)
parent6d037de90a1fd7b4879b48d4dd5c4839b271be98 (diff)
downloadlinux-4f302921c1458d790ae21147f7043f4e6b6a1085.tar.gz
linux-4f302921c1458d790ae21147f7043f4e6b6a1085.tar.xz
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS fix from Ralf Baechle: "Only a single fix for 4.7 pending at this point. It fixes an issue that may lead to corruption of the cache mode bits in the page table" * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: MIPS: Fix possible corruption of cache mode by mprotect.
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/include/asm/pgtable.h10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index a6b611f..f538167 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -24,7 +24,7 @@ struct mm_struct;
struct vm_area_struct;
#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_NO_READ | \
- _CACHE_CACHABLE_NONCOHERENT)
+ _page_cachable_default)
#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_WRITE | \
_page_cachable_default)
#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_NO_EXEC | \
@@ -476,7 +476,7 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
pte.pte_low &= (_PAGE_MODIFIED | _PAGE_ACCESSED | _PFNX_MASK);
pte.pte_high &= (_PFN_MASK | _CACHE_MASK);
pte.pte_low |= pgprot_val(newprot) & ~_PFNX_MASK;
- pte.pte_high |= pgprot_val(newprot) & ~_PFN_MASK;
+ pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK);
return pte;
}
#elif defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
@@ -491,7 +491,8 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
#else
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
- return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
+ return __pte((pte_val(pte) & _PAGE_CHG_MASK) |
+ (pgprot_val(newprot) & ~_PAGE_CHG_MASK));
}
#endif
@@ -632,7 +633,8 @@ static inline struct page *pmd_page(pmd_t pmd)
static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
{
- pmd_val(pmd) = (pmd_val(pmd) & _PAGE_CHG_MASK) | pgprot_val(newprot);
+ pmd_val(pmd) = (pmd_val(pmd) & _PAGE_CHG_MASK) |
+ (pgprot_val(newprot) & ~_PAGE_CHG_MASK);
return pmd;
}