3 Commits

Author	SHA1	Message	Date
Michael S. Tsirkin	3226aad81a	sh: support 1 and 2 byte xchg ... This completes the xchg implementation for sh architecture. Note: The llsc variant is tricky since this only supports 4 byte atomics, the existing implementation of 1 byte xchg is wrong: we need to do a 4 byte cmpxchg and retry if any bytes changed meanwhile. Write this in C for clarity. Suggested-by: Rich Felker <dalias@libc.org> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>	2016-01-12 20:47:01 +02:00
Thomas Gleixner	a22e5f579b	arch: Remove __ARCH_HAVE_CMPXCHG ... We removed the only user of this define in the rtmutex code. Get rid of it. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>	2015-05-13 10:55:42 +02:00
David Howells	e839ca5287	Disintegrate asm/system.h for SH ... Disintegrate asm/system.h for SH. Signed-off-by: David Howells <dhowells@redhat.com> cc: linux-sh@vger.kernel.org	2012-03-28 18:30:03 +01:00