From b065444286bed7ec49ee81c593a46f3031fbfc83 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 10 Sep 2016 18:53:30 -0400 Subject: blackfin: no access_ok() for __copy_{to,from}_user() callers have checked that already Signed-off-by: Al Viro --- arch/blackfin/include/asm/uaccess.h | 32 ++++++++++++++++++++------------ 1 file changed, 20 insertions(+), 12 deletions(-) (limited to 'arch/blackfin') diff --git a/arch/blackfin/include/asm/uaccess.h b/arch/blackfin/include/asm/uaccess.h index 0a2a70096d8b..0eff88aa6d6a 100644 --- a/arch/blackfin/include/asm/uaccess.h +++ b/arch/blackfin/include/asm/uaccess.h @@ -163,18 +163,29 @@ static inline int bad_user_access_length(void) : "a" (__ptr(ptr))); \ }) -#define __copy_from_user(to, from, n) copy_from_user(to, from, n) -#define __copy_to_user(to, from, n) copy_to_user(to, from, n) #define __copy_to_user_inatomic __copy_to_user #define __copy_from_user_inatomic __copy_from_user +static inline unsigned long __must_check +__copy_from_user(void *to, const void __user *from, unsigned long 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) +{ + memcpy((void __force *)to, from, n); + SSYNC(); + return 0; +} + static inline unsigned long __must_check copy_from_user(void *to, const void __user *from, unsigned long n) { - if (likely(access_ok(VERIFY_READ, from, n))) { - memcpy(to, (const void __force *)from, n); - return 0; - } + if (likely(access_ok(VERIFY_READ, from, n))) + return __copy_from_user(to, from, n); memset(to, 0, n); return n; } @@ -182,12 +193,9 @@ copy_from_user(void *to, const void __user *from, unsigned long n) static inline unsigned long __must_check copy_to_user(void __user *to, const void *from, unsigned long n) { - if (access_ok(VERIFY_WRITE, to, n)) - memcpy((void __force *)to, from, n); - else - return n; - SSYNC(); - return 0; + if (likely(access_ok(VERIFY_WRITE, to, n))) + return __copy_to_user(to, from, n); + return n; } /* -- cgit v1.2.3-58-ga151