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Miller" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Andy Shevchenko , Eric Dumazet , Jakub Kicinski , Paolo Abeni Subject: [PATCH net-next v1 1/2] string: Make memscan() to take const Date: Thu, 16 Feb 2023 13:42:33 +0200 Message-Id: <20230216114234.36343-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.39.1 MIME-Version: 1.0 X-Spam-Status: No, score=-4.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1757987936928380586?= X-GMAIL-MSGID: =?utf-8?q?1757987936928380586?= Make memscan() to take const so it will be easier replace some memchr() cases with it. Signed-off-by: Andy Shevchenko --- arch/s390/include/asm/string.h | 4 ++-- arch/s390/lib/string.c | 2 +- arch/sparc/include/asm/asm-prototypes.h | 4 ++-- arch/sparc/include/asm/string.h | 7 ++++--- arch/x86/include/asm/string_32.h | 2 +- arch/x86/lib/string_32.c | 2 +- include/linux/string.h | 2 +- lib/string.c | 2 +- 8 files changed, 13 insertions(+), 12 deletions(-) diff --git a/arch/s390/include/asm/string.h b/arch/s390/include/asm/string.h index 3fae93ddb322..0196fd466a39 100644 --- a/arch/s390/include/asm/string.h +++ b/arch/s390/include/asm/string.h @@ -120,7 +120,7 @@ static inline void *memchr(const void * s, int c, size_t n) #endif #ifdef __HAVE_ARCH_MEMSCAN -static inline void *memscan(void *s, int c, size_t n) +static inline void *memscan(const void *s, int c, size_t n) { const void *ret = s + n; @@ -205,7 +205,7 @@ static inline size_t strnlen(const char * s, size_t n) #endif #else /* IN_ARCH_STRING_C */ void *memchr(const void * s, int c, size_t n); -void *memscan(void *s, int c, size_t n); +void *memscan(const void *s, int c, size_t n); char *strcat(char *dst, const char *src); char *strcpy(char *dst, const char *src); size_t strlen(const char *s); diff --git a/arch/s390/lib/string.c b/arch/s390/lib/string.c index 7d8741818239..ec9786fde1dd 100644 --- a/arch/s390/lib/string.c +++ b/arch/s390/lib/string.c @@ -331,7 +331,7 @@ EXPORT_SYMBOL(memcmp); * the area if @c is not found */ #ifdef __HAVE_ARCH_MEMSCAN -void *memscan(void *s, int c, size_t n) +void *memscan(const void *s, int c, size_t n) { const void *ret = s + n; diff --git a/arch/sparc/include/asm/asm-prototypes.h b/arch/sparc/include/asm/asm-prototypes.h index 4987c735ff56..3a82a86a27a6 100644 --- a/arch/sparc/include/asm/asm-prototypes.h +++ b/arch/sparc/include/asm/asm-prototypes.h @@ -13,8 +13,8 @@ #include #include -void *__memscan_zero(void *, size_t); -void *__memscan_generic(void *, int, size_t); +void *__memscan_zero(const void *, size_t); +void *__memscan_generic(const void *, int, size_t); void *__bzero(void *, size_t); void VISenter(void); /* Dummy prototype to supress warning */ #undef memcpy diff --git a/arch/sparc/include/asm/string.h b/arch/sparc/include/asm/string.h index 001a17baf2d5..7761a037b377 100644 --- a/arch/sparc/include/asm/string.h +++ b/arch/sparc/include/asm/string.h @@ -21,10 +21,11 @@ void *memmove(void *, const void *, __kernel_size_t); #define memscan(__arg0, __char, __arg2) \ ({ \ - void *__memscan_zero(void *, size_t); \ - void *__memscan_generic(void *, int, size_t); \ - void *__retval, *__addr = (__arg0); \ + void *__memscan_zero(const void *, size_t); \ + void *__memscan_generic(const void *, int, size_t); \ + const void *__addr = (__arg0); \ size_t __size = (__arg2); \ + void *__retval; \ \ if(__builtin_constant_p(__char) && !(__char)) \ __retval = __memscan_zero(__addr, __size); \ diff --git a/arch/x86/include/asm/string_32.h b/arch/x86/include/asm/string_32.h index 32c0d981a82a..30245f7707e7 100644 --- a/arch/x86/include/asm/string_32.h +++ b/arch/x86/include/asm/string_32.h @@ -223,7 +223,7 @@ static inline void *memset32(uint32_t *s, uint32_t v, size_t n) * find the first occurrence of byte 'c', or 1 past the area if none */ #define __HAVE_ARCH_MEMSCAN -extern void *memscan(void *addr, int c, size_t size); +extern void *memscan(const void *addr, int c, size_t size); #endif /* __KERNEL__ */ diff --git a/arch/x86/lib/string_32.c b/arch/x86/lib/string_32.c index 53b3f202267c..4124d6678f72 100644 --- a/arch/x86/lib/string_32.c +++ b/arch/x86/lib/string_32.c @@ -198,7 +198,7 @@ EXPORT_SYMBOL(memchr); #endif #ifdef __HAVE_ARCH_MEMSCAN -void *memscan(void *addr, int c, size_t size) +void *memscan(const void *addr, int c, size_t size) { if (!size) return addr; diff --git a/include/linux/string.h b/include/linux/string.h index c062c581a98b..a7bff7ed3cb0 100644 --- a/include/linux/string.h +++ b/include/linux/string.h @@ -150,7 +150,7 @@ extern void * memcpy(void *,const void *,__kernel_size_t); extern void * memmove(void *,const void *,__kernel_size_t); #endif #ifndef __HAVE_ARCH_MEMSCAN -extern void * memscan(void *,int,__kernel_size_t); +extern void * memscan(const void *,int,__kernel_size_t); #endif #ifndef __HAVE_ARCH_MEMCMP extern int memcmp(const void *,const void *,__kernel_size_t); diff --git a/lib/string.c b/lib/string.c index 3d55ef890106..30a63048d4cc 100644 --- a/lib/string.c +++ b/lib/string.c @@ -725,7 +725,7 @@ EXPORT_SYMBOL(bcmp); * returns the address of the first occurrence of @c, or 1 byte past * the area if @c is not found */ -void *memscan(void *addr, int c, size_t size) +void *memscan(const void *addr, int c, size_t size) { unsigned char *p = addr;