openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

powerpc/mm: Use pte_raw() in pte_same()/pmd_same() 

We can avoid doing endian conversions by using pte_raw() in pxx_same().
The swap of the constant (_PAGE_HPTEFLAGS) should be done at compile
time by the compiler.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman 2016-04-29 23:25:29 +10:00
parent 5dc1ef858c
commit ee3caed37d
2 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/powerpc/include/asm/book3s/64/hash-64k.h
View File

@ -272,7 +272,7 @@ static inline pmd_t pmd_mknotpresent(pmd_t pmd)
#define __HAVE_ARCH_PMD_SAME
static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
{
return (((pmd_val(pmd_a) ^ pmd_val(pmd_b)) & ~_PAGE_HPTEFLAGS) == 0);
return (((pmd_raw(pmd_a) ^ pmd_raw(pmd_b)) & ~cpu_to_be64(_PAGE_HPTEFLAGS)) == 0);
}
static inline int __pmdp_test_and_clear_young(struct mm_struct *mm,

6
arch/powerpc/include/asm/book3s/64/hash.h
View File

@ -372,7 +372,11 @@ static inline int pgd_bad(pgd_t pgd)
}
#define __HAVE_ARCH_PTE_SAME
#define pte_same(A,B) (((pte_val(A) ^ pte_val(B)) & ~_PAGE_HPTEFLAGS) == 0)
static inline int pte_same(pte_t pte_a, pte_t pte_b)
{
return (((pte_raw(pte_a) ^ pte_raw(pte_b)) & ~cpu_to_be64(_PAGE_HPTEFLAGS)) == 0);
}
static inline unsigned long pgd_page_vaddr(pgd_t pgd)
{
return (unsigned long)__va(pgd_val(pgd) & ~PGD_MASKED_BITS);