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https://github.com/LineageOS/android_kernel_fxtec_sm6115.git
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7858424928
[ Upstream commit b52343d1cb47bb27ca32a3f4952cc2fd3cd165bf ] The current logic to split the 64-bit argument into its 32-bit halves is byte-order specific and a bit clunky. Use a union instead which is easier to read and works in all cases. GCC still generates the same machine code. While at it, rename the arguments of the __memset64() prototype to actually reflect their semantics. Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Reported-by: Ben Hutchings <ben@decadent.org.uk> # for -stable Link: https://lore.kernel.org/all/1a11526ae3d8664f705b541b8d6ea57b847b49a8.camel@decadent.org.uk/ Suggested-by: https://lore.kernel.org/all/aZonkWMwpbFhzDJq@casper.infradead.org/ # for -stable Link: https://lore.kernel.org/all/aZonkWMwpbFhzDJq@casper.infradead.org/ Signed-off-by: Ulrich Hecht <uli@kernel.org>
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_ARM_STRING_H
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#define __ASM_ARM_STRING_H
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/*
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* We don't do inline string functions, since the
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* optimised inline asm versions are not small.
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*/
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#define __HAVE_ARCH_STRRCHR
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extern char * strrchr(const char * s, int c);
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#define __HAVE_ARCH_STRCHR
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extern char * strchr(const char * s, int c);
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#define __HAVE_ARCH_MEMCPY
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extern void * memcpy(void *, const void *, __kernel_size_t);
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#define __HAVE_ARCH_MEMMOVE
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extern void * memmove(void *, const void *, __kernel_size_t);
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#define __HAVE_ARCH_MEMCHR
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extern void * memchr(const void *, int, __kernel_size_t);
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#define __HAVE_ARCH_MEMSET
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extern void * memset(void *, int, __kernel_size_t);
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#define __HAVE_ARCH_MEMSET32
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extern void *__memset32(uint32_t *, uint32_t v, __kernel_size_t);
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static inline void *memset32(uint32_t *p, uint32_t v, __kernel_size_t n)
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{
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return __memset32(p, v, n * 4);
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}
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#define __HAVE_ARCH_MEMSET64
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extern void *__memset64(uint64_t *, uint32_t first, __kernel_size_t, uint32_t second);
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static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
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{
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union {
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uint64_t val;
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struct {
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uint32_t first, second;
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};
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} word = { .val = v };
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return __memset64(p, word.first, n * 8, word.second);
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}
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#endif
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