diff options
| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-02-09 14:02:12 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-02-11 23:35:35 +1100 |
| commit | 6b385d1d7c0a346758e35b128815afa25d4709ee (patch) | |
| tree | 026f08120ba81a37d256ffc07c1f3390b96b0a95 /arch/powerpc/include/asm/uaccess.h | |
| parent | powerpc/64: Fix stack trace not displaying final frame (diff) | |
| download | linux-dev-6b385d1d7c0a346758e35b128815afa25d4709ee.tar.xz linux-dev-6b385d1d7c0a346758e35b128815afa25d4709ee.zip | |
powerpc/uaccess: get rid of small constant size cases in raw_copy_{to,from}_user()
Copied from commit 4b842e4e25b1 ("x86: get rid of small
constant size cases in raw_copy_{to,from}_user()")
Very few call sites where that would be triggered remain, and none
of those is anywhere near hot enough to bother.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/99d4ccb58a20d8408d0e19874393655ad5b40822.1612879284.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/include/asm/uaccess.h')
| -rw-r--r-- | arch/powerpc/include/asm/uaccess.h | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h index 85d6712dc8ed..88f5b0fe9a12 100644 --- a/arch/powerpc/include/asm/uaccess.h +++ b/arch/powerpc/include/asm/uaccess.h @@ -398,26 +398,6 @@ static inline unsigned long raw_copy_from_user(void *to, const void __user *from, unsigned long n) { unsigned long ret; - if (__builtin_constant_p(n) && (n <= 8)) { - ret = 1; - - switch (n) { - case 1: - __get_user_size(*(u8 *)to, from, 1, ret); - break; - case 2: - __get_user_size(*(u16 *)to, from, 2, ret); - break; - case 4: - __get_user_size(*(u32 *)to, from, 4, ret); - break; - case 8: - __get_user_size(*(u64 *)to, from, 8, ret); - break; - } - if (ret == 0) - return 0; - } allow_read_from_user(from, n); ret = __copy_tofrom_user((__force void __user *)to, from, n); @@ -428,27 +408,6 @@ static inline unsigned long raw_copy_from_user(void *to, static inline unsigned long raw_copy_to_user_allowed(void __user *to, const void *from, unsigned long n) { - if (__builtin_constant_p(n) && (n <= 8)) { - unsigned long ret = 1; - - switch (n) { - case 1: - __put_user_size_allowed(*(u8 *)from, (u8 __user *)to, 1, ret); - break; - case 2: - __put_user_size_allowed(*(u16 *)from, (u16 __user *)to, 2, ret); - break; - case 4: - __put_user_size_allowed(*(u32 *)from, (u32 __user *)to, 4, ret); - break; - case 8: - __put_user_size_allowed(*(u64 *)from, (u64 __user *)to, 8, ret); - break; - } - if (ret == 0) - return 0; - } - return __copy_tofrom_user(to, (__force const void __user *)from, n); } |