powerpc fixes for 5.0 #5

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.
 -----BEGIN PGP SIGNATURE-----
 
 iQIcBAABAgAGBQJcaReiAAoJEFHr6jzI4aWAoy0P/09u2Vbj2vcOuFn/9BZ7JK5w
 Pw9lHPC2NHtoM3Wq1ZAK3GPELkU4Bl4xtorFgC1/f0Oe3Nt3wHs6tfu+jx/qTgtz
 +j1fR7Q0nKA62uJ53n9i4e3HLWJR80gFkczpWFMSgpbNdw/pvzZfW1YlXQs/iZTX
 A0lwfrMKc8ud1KkAr7S1rzWnF+55gwOmia4F6fkHBAV/vo2rj861LTY0FRz5OdW0
 h4OyQEmw/LBRnZW0SJJBGFib8HtpANc4a35Lbq9x7PMAsAGCvNBpqbVx1fkgRzEt
 lVY/bUqFK8+KOQuao8T8FFN9y8upwayb5PZdlz3YlONSdZsDa3VbcQG2qLUhmJZQ
 2NS0cuw2uJ7QP8iC26j1SH8EdcraQsYxl57nQZhtI38pP5RXT+C1+aZEwk2DNaPK
 BQM4asEd9YNCKRvU/cxhS5Gv2BnerUuktF72vEx/ul/wXIjJXO4buIZyGDiznVsk
 AImmdPA8yiGa8+0DN/TCuizFSMx3rwZEYPux6MqU40K/xp3f0eEiqCZD7xQ5kh+C
 Vi5TV6/epTqUYbeKkrqMyJ+0CmeTWF2YL3hZ3Na5+XwIhgSOGGiGGpPrXcVqwvA0
 t+zhN/L99urBtg3ubwiVfRd8WbZS5/9kDEhAZwsYjGxboVg4cnhniHU4RHIO/VYE
 0MlwXdiZMXTJolzpZfuF
 =8du7
 -----END PGP SIGNATURE-----

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

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)