s390/kasan: remove override of mem*() functions

The kasan mem*() functions are not used anymore since s390 has switched
to GENERIC_ENTRY and commit 69d4c0d32186 ("entry, kasan, x86: Disallow
overriding mem*() functions").

Therefore remove the now dead code, similar to x86.
While at it also use the SYM* macros in mem.S.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

diff --git a/arch/s390/include/asm/string.h b/arch/s390/include/asm/string.h
index 3fae93ddb322a9f81c7e41613bf51ef7e0807783..351685de53d2ebccf5c2f0a0524803ecb5b0a7d0 100644 (file)
--- a/arch/s390/include/asm/string.h
+++ b/arch/s390/include/asm/string.h
@@ -55,18 +55,6 @@ char *strstr(const char *s1, const char *s2);
 
 #if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
 
-extern void *__memcpy(void *dest, const void *src, size_t n);
-extern void *__memset(void *s, int c, size_t n);
-extern void *__memmove(void *dest, const void *src, size_t n);
-
-/*
- * For files that are not instrumented (e.g. mm/slub.c) we
- * should use not instrumented version of mem* functions.
- */
-
-#define memcpy(dst, src, len) __memcpy(dst, src, len)
-#define memmove(dst, src, len) __memmove(dst, src, len)
-#define memset(s, c, n) __memset(s, c, n)
 #define strlen(s) __strlen(s)
 
 #define __no_sanitize_prefix_strfunc(x) __##x
@@ -79,6 +67,9 @@ extern void *__memmove(void *dest, const void *src, size_t n);
 #define __no_sanitize_prefix_strfunc(x) x
 #endif /* defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) */
 
+void *__memcpy(void *dest, const void *src, size_t n);
+void *__memset(void *s, int c, size_t n);
+void *__memmove(void *dest, const void *src, size_t n);
 void *__memset16(uint16_t *s, uint16_t v, size_t count);
 void *__memset32(uint32_t *s, uint32_t v, size_t count);
 void *__memset64(uint64_t *s, uint64_t v, size_t count);

diff --git a/arch/s390/lib/mem.S b/arch/s390/lib/mem.S
index dc0874f2e203c79c691ffb5746a3c0650aaa3cbc..2e0480424f40ad3113e0404db06ce510e00fd7d3 100644 (file)
--- a/arch/s390/lib/mem.S
+++ b/arch/s390/lib/mem.S
@@ -14,8 +14,7 @@
 /*
  * void *memmove(void *dest, const void *src, size_t n)
  */
-WEAK(memmove)
-ENTRY(__memmove)
+SYM_FUNC_START(__memmove)
        ltgr    %r4,%r4
        lgr     %r1,%r2
        jz      .Lmemmove_exit
@@ -48,7 +47,10 @@ ENTRY(__memmove)
        BR_EX   %r14
 .Lmemmove_mvc:
        mvc     0(1,%r1),0(%r3)
-ENDPROC(__memmove)
+SYM_FUNC_END(__memmove)
+EXPORT_SYMBOL(__memmove)
+
+SYM_FUNC_ALIAS(memmove, __memmove)
 EXPORT_SYMBOL(memmove)
 
 /*
@@ -66,8 +68,7 @@ EXPORT_SYMBOL(memmove)
  *     return __builtin_memset(s, c, n);
  * }
  */
-WEAK(memset)
-ENTRY(__memset)
+SYM_FUNC_START(__memset)
        ltgr    %r4,%r4
        jz      .Lmemset_exit
        ltgr    %r3,%r3
@@ -111,7 +112,10 @@ ENTRY(__memset)
        xc      0(1,%r1),0(%r1)
 .Lmemset_mvc:
        mvc     1(1,%r1),0(%r1)
-ENDPROC(__memset)
+SYM_FUNC_END(__memset)
+EXPORT_SYMBOL(__memset)
+
+SYM_FUNC_ALIAS(memset, __memset)
 EXPORT_SYMBOL(memset)
 
 /*
@@ -119,8 +123,7 @@ EXPORT_SYMBOL(memset)
  *
  * void *memcpy(void *dest, const void *src, size_t n)
  */
-WEAK(memcpy)
-ENTRY(__memcpy)
+SYM_FUNC_START(__memcpy)
        ltgr    %r4,%r4
        jz      .Lmemcpy_exit
        aghi    %r4,-1
@@ -141,7 +144,10 @@ ENTRY(__memcpy)
        j       .Lmemcpy_remainder
 .Lmemcpy_mvc:
        mvc     0(1,%r1),0(%r3)
-ENDPROC(__memcpy)
+SYM_FUNC_END(__memcpy)
+EXPORT_SYMBOL(__memcpy)
+
+SYM_FUNC_ALIAS(memcpy, __memcpy)
 EXPORT_SYMBOL(memcpy)
 
 /*