diff options
| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-03-10 17:57:00 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-03-26 23:19:41 +1100 |
| commit | c6adc835c68b713360f918d21372c2f34fc228e2 (patch) | |
| tree | 35fdbce9aaec24820278bd399df2c99a0431f93b /arch/powerpc/include/asm/uaccess.h | |
| parent | powerpc/pseries: export LPAR security flavor in lparcfg (diff) | |
| download | linux-dev-c6adc835c68b713360f918d21372c2f34fc228e2.tar.xz linux-dev-c6adc835c68b713360f918d21372c2f34fc228e2.zip | |
powerpc/uaccess: Also perform 64 bits copies in unsafe_copy_to_user() on ppc32
ppc32 has an efficiant 64 bits __put_user(), so also use it in
order to unroll loops more.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/ccc08a16eea682d6fa4acc957ffe34003a8f0844.1615398498.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/include/asm/uaccess.h')
| -rw-r--r-- | arch/powerpc/include/asm/uaccess.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h index 78e2a3990eab..2c09cff205ef 100644 --- a/arch/powerpc/include/asm/uaccess.h +++ b/arch/powerpc/include/asm/uaccess.h @@ -494,9 +494,9 @@ do { \ size_t _len = (l); \ int _i; \ \ - for (_i = 0; _i < (_len & ~(sizeof(long) - 1)); _i += sizeof(long)) \ - unsafe_put_user(*(long*)(_src + _i), (long __user *)(_dst + _i), e); \ - if (IS_ENABLED(CONFIG_PPC64) && (_len & 4)) { \ + for (_i = 0; _i < (_len & ~(sizeof(u64) - 1)); _i += sizeof(u64)) \ + unsafe_put_user(*(u64 *)(_src + _i), (u64 __user *)(_dst + _i), e); \ + if (_len & 4) { \ unsafe_put_user(*(u32*)(_src + _i), (u32 __user *)(_dst + _i), e); \ _i += 4; \ } \ |