2 Commits

Author	SHA1	Message	Date
Stafford Horne	8af42949d1	openrisc: xchg: fix `computed is not used` warning ... When building allmodconfig this warning shows. fs/ocfs2/file.c: In function 'ocfs2_file_write_iter': ./arch/openrisc/include/asm/cmpxchg.h:81:3: warning: value computed is not used [-Wunused-value] ((typeof(*(ptr)))__xchg((unsigned long)(with), (ptr), sizeof(*(ptr)))) ^ Applying the same patch logic that was done to the cmpxchg macro. Signed-off-by: Stafford Horne <shorne@gmail.com>	2017-03-16 00:12:56 +09:00
Stefan Kristiansson	1159517253	openrisc: add cmpxchg and xchg implementations ... Optimized version that make use of the l.lwa and l.swa atomic instruction pair. Most openrisc cores provide these instructions now, if not available emulation is provided. Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi> [shorne@gmail.com: remove OPENRISC_HAVE_INST_LWA_SWA config suggesed by Alan Cox https://lkml.org/lkml/2014/7/23/666] [shorne@gmail.com: fixed unused calculated value compiler warning in define cmpxchg] Signed-off-by: Stafford Horne <shorne@gmail.com>	2017-02-25 04:14:00 +09:00