Files
android_kernel_fxtec_sm6115/include/linux
Mark Rutland 18cc1814d4 atomics/treewide: Make test ops optional
Some of the atomics return the result of a test applied after the atomic
operation, and almost all architectures implement these as trivial
wrappers around the underlying atomic. Specifically:

 * <atomic>_inc_and_test(v)    is (<atomic>_inc_return(v)    == 0)
 * <atomic>_dec_and_test(v)    is (<atomic>_dec_return(v)    == 0)
 * <atomic>_sub_and_test(i, v) is (<atomic>_sub_return(i, v) == 0)
 * <atomic>_add_negative(i, v) is (<atomic>_add_return(i, v)  < 0)

Rather than have these definitions duplicated in all architectures, with
minor inconsistencies in formatting and documentation, let's make these
operations optional, with default fallbacks as above. Implementations
must now provide a preprocessor symbol.

The instrumented atomics are updated accordingly.

Both x86 and m68k have custom implementations, which are left as-is,
given preprocessor symbols to avoid being overridden.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Palmer Dabbelt <palmer@sifive.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/lkml/20180621121321.4761-16-mark.rutland@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-06-21 14:25:24 +02:00
..
2018-05-25 18:23:56 +02:00
2018-05-23 14:01:03 +02:00
2018-06-05 10:48:09 -04:00
2018-06-07 14:23:08 +01:00
2018-06-07 17:34:35 -07:00
2018-05-26 09:16:44 +02:00
2018-06-15 18:10:01 -03:00
2018-06-14 17:01:45 +02:00
2018-05-28 17:41:02 +02:00
2018-05-09 17:25:13 +02:00
2018-06-15 18:10:01 -03:00
2018-06-01 07:38:16 -06:00
2018-06-15 18:10:01 -03:00
2018-06-07 17:34:37 -07:00
2018-05-22 13:42:16 +02:00
2018-05-09 12:21:46 -05:00
2018-06-05 08:50:16 -04:00
2018-06-15 07:55:25 +09:00
2018-06-07 17:34:35 -07:00
2018-06-07 17:34:37 -07:00
2018-06-12 16:19:22 -07:00
2018-06-07 17:34:39 -07:00
2018-06-01 14:37:35 +02:00
2018-06-07 17:34:36 -07:00
2018-06-06 16:10:45 -05:00
2018-05-15 15:51:38 +01:00
2018-06-07 17:34:35 -07:00
2018-05-31 00:13:56 +08:00
2018-05-11 17:28:45 -07:00
2018-05-11 17:28:45 -07:00
2018-06-04 17:28:20 -04:00
2018-05-04 12:48:54 -07:00
2018-06-07 17:34:35 -07:00
2018-06-07 17:34:37 -07:00
2018-05-03 15:55:23 -07:00
2018-05-18 11:40:27 -04:00
2018-05-19 13:57:31 +02:00
2018-05-19 13:57:31 +02:00
2018-05-14 09:51:34 -04:00