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powerpc fixes for 5.0 #5

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Just one fix, for pgd/pud_present() which were broken on big endian since v4.20,
 leading to possible data corruption.
 
 Thanks to:
   Aneesh Kumar K.V., Erhard F., Jan Kara.
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Merge tag 'powerpc-5.0-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:
 "Just one fix, for pgd/pud_present() which were broken on big endian
  since v4.20, leading to possible data corruption.

  Thanks to: Aneesh Kumar K.V., Erhard F., Jan Kara"

* tag 'powerpc-5.0-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64s: Fix possible corruption on big endian due to pgd/pud_present()
This commit is contained in:
Linus Torvalds 2019-02-17 08:36:21 -08:00
commit c5f1ac5e9a
1 changed files with 2 additions and 2 deletions
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4
arch/powerpc/include/asm/book3s/64/pgtable.h
View file

@ -904,7 +904,7 @@ static inline int pud_none(pud_t pud)
static inline int pud_present(pud_t pud) static inline int pud_present(pud_t pud)
{ {
return (pud_raw(pud) & cpu_to_be64(_PAGE_PRESENT)); return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PRESENT));
} }
extern struct page *pud_page(pud_t pud); extern struct page *pud_page(pud_t pud);
@ -951,7 +951,7 @@ static inline int pgd_none(pgd_t pgd)
static inline int pgd_present(pgd_t pgd) static inline int pgd_present(pgd_t pgd)
{ {
return (pgd_raw(pgd) & cpu_to_be64(_PAGE_PRESENT)); return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PRESENT));
} }
static inline pte_t pgd_pte(pgd_t pgd) static inline pte_t pgd_pte(pgd_t pgd)