[RFC,3/4] ARC: uaccess: remove noinline variants of __strncpy_from_user() and friends
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Message ID 20200114200846.29434-4-vgupta@synopsys.com
State New
Headers show
  • Switching ARC to optimized generic strncpy_from_user
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Commit Message

Vineet Gupta Jan. 14, 2020, 8:08 p.m. UTC
This helps with subsequent removal of arch specific variants in favour
of optimized generic routines (word vs byte access)

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
 arch/arc/include/asm/uaccess.h | 26 ++++++--------------------
 arch/arc/mm/extable.c          | 23 -----------------------
 2 files changed, 6 insertions(+), 43 deletions(-)

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diff --git a/arch/arc/include/asm/uaccess.h b/arch/arc/include/asm/uaccess.h
index ea40ec7f6cae..0b34c152086f 100644
--- a/arch/arc/include/asm/uaccess.h
+++ b/arch/arc/include/asm/uaccess.h
@@ -613,7 +613,7 @@  raw_copy_to_user(void __user *to, const void *from, unsigned long n)
 	return res;
-static inline unsigned long __arc_clear_user(void __user *to, unsigned long n)
+static inline unsigned long __clear_user(void __user *to, unsigned long n)
 	long res = n;
 	unsigned char *d_char = to;
@@ -656,7 +656,7 @@  static inline unsigned long __arc_clear_user(void __user *to, unsigned long n)
 static inline long
-__arc_strncpy_from_user(char *dst, const char __user *src, long count)
+__strncpy_from_user(char *dst, const char __user *src, long count)
 	long res = 0;
 	char val;
@@ -688,7 +688,7 @@  __arc_strncpy_from_user(char *dst, const char __user *src, long count)
 	return res;
-static inline long __arc_strnlen_user(const char __user *s, long n)
+static inline long __strnlen_user(const char __user *s, long n)
 	long res, tmp1, cnt;
 	char val;
@@ -718,26 +718,12 @@  static inline long __arc_strnlen_user(const char __user *s, long n)
 	return res;
-#define __clear_user(d, n)		__arc_clear_user(d, n)
-#define __strncpy_from_user(d, s, n)	__arc_strncpy_from_user(d, s, n)
-#define __strnlen_user(s, n)		__arc_strnlen_user(s, n)
-extern unsigned long arc_clear_user_noinline(void __user *to,
-		unsigned long n);
-extern long arc_strncpy_from_user_noinline (char *dst, const char __user *src,
-		long count);
-extern long arc_strnlen_user_noinline(const char __user *src, long n);
-#define __clear_user(d, n)		arc_clear_user_noinline(d, n)
-#define __strncpy_from_user(d, s, n)	arc_strncpy_from_user_noinline(d, s, n)
-#define __strnlen_user(s, n)		arc_strnlen_user_noinline(s, n)
+#define __clear_user		__clear_user
+#define __strncpy_from_user	__strncpy_from_user
+#define __strnlen_user		__strnlen_user
 #include <asm/segment.h>
 #include <asm-generic/uaccess.h>
diff --git a/arch/arc/mm/extable.c b/arch/arc/mm/extable.c
index b06b09ddf924..88fa3a4d4906 100644
--- a/arch/arc/mm/extable.c
+++ b/arch/arc/mm/extable.c
@@ -22,26 +22,3 @@  int fixup_exception(struct pt_regs *regs)
 	return 0;
-unsigned long arc_clear_user_noinline(void __user *to,
-		unsigned long n)
-	return __arc_clear_user(to, n);
-long arc_strncpy_from_user_noinline(char *dst, const char __user *src,
-		long count)
-	return __arc_strncpy_from_user(dst, src, count);
-long arc_strnlen_user_noinline(const char __user *src, long n)
-	return __arc_strnlen_user(src, n);