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e6c76d6203
Moving feature checks code under tools/build directory. Changing also $feature_dir to point to new feature directory location and perf Makefiles to include Makefile.feature from new location. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <david.ahern@oracle.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/n/tip-3lamtb30dhf4wo99y1n8kxg0@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
15 lines
251 B
C
15 lines
251 B
C
#include <stdint.h>
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volatile uint64_t x;
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int main(int argc, char *argv[])
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{
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uint64_t old, new = argc;
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argv = argv;
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do {
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old = __sync_val_compare_and_swap(&x, 0, 0);
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} while (!__sync_bool_compare_and_swap(&x, old, new));
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return old == new;
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}
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