kernel/tools/include/linux/compiler.h, branch linux-4.7.y

tools include: Fix strict-aliasing rules breakage

2015-10-13T14:43:16Z

Vinson reported build breakage with gcc 4.4 due to strict-aliasing. CC util/annotate.o cc1: warnings being treated as errors util/annotate.c: In function ‘disasm__purge’: linux-next/tools/include/linux/compiler.h:66: error: dereferencing pointer ‘res.41’ does break strict-aliasing rules The reason is READ_ONCE/WRITE_ONCE code we took from kernel sources. They intentionaly break aliasing rules. While this is ok for kernel because it's built with -fno-strict-aliasing, it breaks perf which is build with -Wstrict-aliasing=3. Using extra __may_alias__ type to allow aliasing in this case. Reported-and-tested-by: Vinson Lee Signed-off-by: Jiri Olsa Cc: Adrian Hunter Cc: Andi Kleen Cc: Martin Liska Cc: Peter Zijlstra Cc: Rabin Vincent Cc: linux-next@vger.kernel.org Link: http://lkml.kernel.org/r/20151013085214.GB2705@krava.brq.redhat.com Signed-off-by: Arnaldo Carvalho de Melo

tools: Adopt {READ,WRITE_ONCE} from the kernel

2015-07-05T18:05:00Z

We need it to build rbtree.c after this cset: commit d72da4a4d973 Author: Peter Zijlstra Date: Wed May 27 11:09:36 2015 +0930 rbtree: Make lockless searches non-fatal Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-qlnzhezv5ddwst0w9fydju0y@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Move barrier() definition to tools/include/linux/compiler.h

2015-05-08T19:05:04Z

To make it generally accessible by other tools/ projects, also will be used in the tools/arch/*/include/asm/barrier.h files that are being introduced now. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-qnjdqwu3vcnt14vqmr6wu788@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Move ACCESS_ONCE from perf.h header

2014-05-05T15:49:07Z

Into tools/include/linux/compiler.h header. Acked-by: Arnaldo Carvalho de Melo Acked-by: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: Corey Ashford Cc: Borislav Petkov Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/n/tip-9sk90owm370kuq3f0ssjjui2@git.kernel.org Signed-off-by: Jiri Olsa

tools include: Define likely/unlikely in linux/compiler.h

2014-01-13T13:06:26Z

Signed-off-by: Namhyung Kim Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1389276059-8829-3-git-send-email-namhyung@kernel.org [ Added the new header to tools/perf/MANIFEST ] Signed-off-by: Arnaldo Carvalho de Melo

tools include: Move perf's linux/compiler.h to a generic place

2014-01-13T13:06:25Z

So that it can be shared with others like libtraceevent. Signed-off-by: Namhyung Kim Acked-by: Borislav Petkov Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Steven Rostedt Link: http://lkml.kernel.org/r/1389276059-8829-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo