[PATCH v1 1/8] powerpc/uaccess: Also perform 64 bits copies in unsafe_copy_to_user() on ppc32
Christophe Leroy
christophe.leroy at csgroup.eu
Thu Mar 11 04:57:00 AEDT 2021
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 at csgroup.eu>
---
arch/powerpc/include/asm/uaccess.h | 6 +++---
1 file 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; \
} \
--
2.25.0
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