From: Lars-Peter Clausen Date: Wed, 17 Oct 2012 14:28:02 +0000 (+0200) Subject: Blackfin: Annotate strncpy_from_user src parameter with __user X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d95dcaa06ba895ec379d80b35c25ddba3a71943a;p=linux-beck.git Blackfin: Annotate strncpy_from_user src parameter with __user The src parameter of strncpy_from_user is supposed to take a string from userspace, so it should be annotated with __user. Doing so fixes the following and similar warnings from sparse: kernel/sys.c:491:51: warning: incorrect type in argument 2 (different address spaces) kernel/sys.c:491:51: expected char const *src kernel/sys.c:491:51: got void [noderef] *arg kernel/sys.c:2061:54: warning: incorrect type in argument 2 (different address spaces) kernel/sys.c:2061:54: expected char const *src kernel/sys.c:2061:54: got char [noderef] * Signed-off-by: Lars-Peter Clausen Signed-off-by: Bob Liu --- diff --git a/arch/blackfin/include/asm/uaccess.h b/arch/blackfin/include/asm/uaccess.h index 5cc111502822..3edb4afa3053 100644 --- a/arch/blackfin/include/asm/uaccess.h +++ b/arch/blackfin/include/asm/uaccess.h @@ -216,12 +216,12 @@ copy_to_user(void __user *to, const void *from, unsigned long n) */ static inline long __must_check -strncpy_from_user(char *dst, const char *src, long count) +strncpy_from_user(char *dst, const char __user *src, long count) { char *tmp; if (!access_ok(VERIFY_READ, src, 1)) return -EFAULT; - strncpy(dst, src, count); + strncpy(dst, (const char __force *)src, count); for (tmp = dst; *tmp && count > 0; tmp++, count--) ; return (tmp - dst); }