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authorAl Viro <viro@zeniv.linux.org.uk>2017-03-21 15:23:33 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2017-03-29 01:23:22 +0300
commit4de5b63e76b2e672478e49622dabe2666b7f727f (patch)
treecdc08979830e638662ab8f1cb31d8cbb55c8c6e8
parent0f9b38cd79d528c1e19693899d989521778cc245 (diff)
downloadlinux-4de5b63e76b2e672478e49622dabe2666b7f727f.tar.xz
arm: switch to RAW_COPY_USER
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--arch/arm/Kconfig1
-rw-r--r--arch/arm/include/asm/uaccess.h60
2 files changed, 15 insertions, 46 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 0d4e71b42c77..6fab7f34739c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -96,6 +96,7 @@ config ARM
select PERF_USE_VMALLOC
select RTC_LIB
select SYS_SUPPORTS_APM_EMULATION
+ select ARCH_HAS_RAW_COPY_USER
# Above selects are sorted alphabetically; please add new ones
# according to that. Thanks.
help
diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h
index 3a9190bc0ffa..2577405d082d 100644
--- a/arch/arm/include/asm/uaccess.h
+++ b/arch/arm/include/asm/uaccess.h
@@ -455,7 +455,7 @@ extern unsigned long __must_check
arm_copy_from_user(void *to, const void __user *from, unsigned long n);
static inline unsigned long __must_check
-__arch_copy_from_user(void *to, const void __user *from, unsigned long n)
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
unsigned int __ua_flags;
@@ -471,7 +471,7 @@ extern unsigned long __must_check
__copy_to_user_std(void __user *to, const void *from, unsigned long n);
static inline unsigned long __must_check
-__arch_copy_to_user(void __user *to, const void *from, unsigned long n)
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
#ifndef CONFIG_UACCESS_WITH_MEMCPY
unsigned int __ua_flags;
@@ -499,54 +499,22 @@ __clear_user(void __user *addr, unsigned long n)
}
#else
-#define __arch_copy_from_user(to, from, n) \
- (memcpy(to, (void __force *)from, n), 0)
-#define __arch_copy_to_user(to, from, n) \
- (memcpy((void __force *)to, from, n), 0)
-#define __clear_user(addr, n) (memset((void __force *)addr, 0, n), 0)
-#endif
-
-static inline unsigned long __must_check
-__copy_from_user(void *to, const void __user *from, unsigned long n)
+static inline unsigned long
+raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
- check_object_size(to, n, false);
- return __arch_copy_from_user(to, from, n);
-}
-
-static inline unsigned long __must_check
-copy_from_user(void *to, const void __user *from, unsigned long n)
-{
- unsigned long res = n;
-
- check_object_size(to, n, false);
-
- if (likely(access_ok(VERIFY_READ, from, n)))
- res = __arch_copy_from_user(to, from, n);
- if (unlikely(res))
- memset(to + (n - res), 0, res);
- return res;
-}
-
-static inline unsigned long __must_check
-__copy_to_user(void __user *to, const void *from, unsigned long n)
-{
- check_object_size(from, n, true);
-
- return __arch_copy_to_user(to, from, n);
+ memcpy(to, (const void __force *)from, n);
+ return 0;
}
-
-static inline unsigned long __must_check
-copy_to_user(void __user *to, const void *from, unsigned long n)
+static inline unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
- check_object_size(from, n, true);
-
- if (access_ok(VERIFY_WRITE, to, n))
- n = __arch_copy_to_user(to, from, n);
- return n;
+ memcpy((void __force *)to, from, n);
+ return 0;
}
-
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
+#define __clear_user(addr, n) (memset((void __force *)addr, 0, n), 0)
+#endif
+#define INLINE_COPY_TO_USER
+#define INLINE_COPY_FROM_USER
static inline unsigned long __must_check clear_user(void __user *to, unsigned long n)
{