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x86: get rid of 'errret' argument to __get_user_xyz() macross 

Every remaining user just has the error case returning -EFAULT.

In fact, the exception was __get_user_asm_nozero(), which was removed in
commit 4b842e4e25 ("x86: get rid of small constant size cases in
raw_copy_{to,from}_user()"), and the other __get_user_xyz() macros just
followed suit for consistency.

Fix up some macro whitespace while at it.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds 2020-03-31 18:23:47 -07:00
parent ab33eb494c
commit 1a323ea535
1 changed files with 15 additions and 15 deletions
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30
arch/x86/include/asm/uaccess.h
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@ -279,13 +279,13 @@ do { \
} while (0) } while (0)
#ifdef CONFIG_X86_32 #ifdef CONFIG_X86_32
#define __get_user_asm_u64(x, ptr, retval, errret) \ #define __get_user_asm_u64(x, ptr, retval) \
({ \ ({ \
__typeof__(ptr) __ptr = (ptr); \ __typeof__(ptr) __ptr = (ptr); \
asm volatile("\n" \ asm volatile("\n" \
"1: movl %2,%%eax\n" \ "1: movl %2,%%eax\n" \
"2: movl %3,%%edx\n" \ "2: movl %3,%%edx\n" \
"3:\n" \ "3:\n" \
".section .fixup,\"ax\"\n" \ ".section .fixup,\"ax\"\n" \
"4: mov %4,%0\n" \ "4: mov %4,%0\n" \
" xorl %%eax,%%eax\n" \ " xorl %%eax,%%eax\n" \
@ -296,37 +296,37 @@ do { \
_ASM_EXTABLE_UA(2b, 4b) \ _ASM_EXTABLE_UA(2b, 4b) \
: "=r" (retval), "=&A"(x) \ : "=r" (retval), "=&A"(x) \
: "m" (__m(__ptr)), "m" __m(((u32 __user *)(__ptr)) + 1), \ : "m" (__m(__ptr)), "m" __m(((u32 __user *)(__ptr)) + 1), \
"i" (errret), "0" (retval)); \ "i" (-EFAULT), "0" (retval)); \
}) })
#else #else
#define __get_user_asm_u64(x, ptr, retval, errret) \ #define __get_user_asm_u64(x, ptr, retval) \
__get_user_asm(x, ptr, retval, "q", "", "=r", errret) __get_user_asm(x, ptr, retval, "q", "", "=r")
#endif #endif
#define __get_user_size(x, ptr, size, retval, errret) \ #define __get_user_size(x, ptr, size, retval) \
do { \ do { \
retval = 0; \ retval = 0; \
__chk_user_ptr(ptr); \ __chk_user_ptr(ptr); \
switch (size) { \ switch (size) { \
case 1: \ case 1: \
__get_user_asm(x, ptr, retval, "b", "b", "=q", errret); \ __get_user_asm(x, ptr, retval, "b", "b", "=q"); \
break; \ break; \
case 2: \ case 2: \
__get_user_asm(x, ptr, retval, "w", "w", "=r", errret); \ __get_user_asm(x, ptr, retval, "w", "w", "=r"); \
break; \ break; \
case 4: \ case 4: \
__get_user_asm(x, ptr, retval, "l", "k", "=r", errret); \ __get_user_asm(x, ptr, retval, "l", "k", "=r"); \
break; \ break; \
case 8: \ case 8: \
__get_user_asm_u64(x, ptr, retval, errret); \ __get_user_asm_u64(x, ptr, retval); \
break; \ break; \
default: \ default: \
(x) = __get_user_bad(); \ (x) = __get_user_bad(); \
} \ } \
} while (0) } while (0)
#define __get_user_asm(x, addr, err, itype, rtype, ltype, errret) \ #define __get_user_asm(x, addr, err, itype, rtype, ltype) \
asm volatile("\n" \ asm volatile("\n" \
"1: mov"itype" %2,%"rtype"1\n" \ "1: mov"itype" %2,%"rtype"1\n" \
"2:\n" \ "2:\n" \
@ -337,7 +337,7 @@ do { \
".previous\n" \ ".previous\n" \
_ASM_EXTABLE_UA(1b, 3b) \ _ASM_EXTABLE_UA(1b, 3b) \
: "=r" (err), ltype(x) \ : "=r" (err), ltype(x) \
: "m" (__m(addr)), "i" (errret), "0" (err)) : "m" (__m(addr)), "i" (-EFAULT), "0" (err))
#define __put_user_nocheck(x, ptr, size) \ #define __put_user_nocheck(x, ptr, size) \
({ \ ({ \
@ -361,7 +361,7 @@ __pu_label: \
__typeof__(ptr) __gu_ptr = (ptr); \ __typeof__(ptr) __gu_ptr = (ptr); \
__typeof__(size) __gu_size = (size); \ __typeof__(size) __gu_size = (size); \
__uaccess_begin_nospec(); \ __uaccess_begin_nospec(); \
__get_user_size(__gu_val, __gu_ptr, __gu_size, __gu_err, -EFAULT); \ __get_user_size(__gu_val, __gu_ptr, __gu_size, __gu_err); \
__uaccess_end(); \ __uaccess_end(); \
(x) = (__force __typeof__(*(ptr)))__gu_val; \ (x) = (__force __typeof__(*(ptr)))__gu_val; \
__builtin_expect(__gu_err, 0); \ __builtin_expect(__gu_err, 0); \
@ -485,7 +485,7 @@ static __must_check __always_inline bool user_access_begin(const void __user *pt
do { \ do { \
int __gu_err; \ int __gu_err; \
__inttype(*(ptr)) __gu_val; \ __inttype(*(ptr)) __gu_val; \
__get_user_size(__gu_val, (ptr), sizeof(*(ptr)), __gu_err, -EFAULT); \ __get_user_size(__gu_val, (ptr), sizeof(*(ptr)), __gu_err); \
(x) = (__force __typeof__(*(ptr)))__gu_val; \ (x) = (__force __typeof__(*(ptr)))__gu_val; \
if (unlikely(__gu_err)) goto err_label; \ if (unlikely(__gu_err)) goto err_label; \
} while (0) } while (0)