platform_kernel-5.15/include/asm-xtensa/mutex.h

/*
 * Pull in the generic implementation for the mutex fastpath.
 *
 * TODO: implement optimized primitives instead, or leave the generic
 * implementation in place, or pick the atomic_xchg() based generic
 * implementation. (see asm-generic/mutex-xchg.h for details)
 */

#include <asm-generic/mutex-dec.h>
[PATCH] mutex subsystem, add default include/asm-*/mutex.h files add the per-arch mutex.h files for the remaining architectures. We default to asm-generic/mutex-dec.h, because that performs quite well on most arches. Arches that do not have atomic decrement/increment instructions should switch to mutex-xchg.h instead. Arches can also provide their own implementation for the mutex fastpath primitives. Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> 2006-01-10 07:59:19 +08:00			`/*`
			`* Pull in the generic implementation for the mutex fastpath.`
			`*`
			`* TODO: implement optimized primitives instead, or leave the generic`
			`* implementation in place, or pick the atomic_xchg() based generic`
			`* implementation. (see asm-generic/mutex-xchg.h for details)`
			`*/`

			`#include <asm-generic/mutex-dec.h>`