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author | Hans Petter Selasky <hselasky@FreeBSD.org> | 2020-04-20 16:21:37 +0000 |
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committer | Hans Petter Selasky <hselasky@FreeBSD.org> | 2020-04-20 16:21:37 +0000 |
commit | b9bf16adfbadbadaf6d7f31a7375354c21e28887 (patch) | |
tree | 578879959174c1f61afe1bbde792375d527933e2 /sys/compat/linuxkpi/common/include/asm | |
parent | f8ae734005d4028d543fb8e74e42651f5d323cc1 (diff) | |
download | src-b9bf16adfbadbadaf6d7f31a7375354c21e28887.tar.gz src-b9bf16adfbadbadaf6d7f31a7375354c21e28887.zip |
Implement the atomic fetch add unless functions for the LinuxKPI.
MFC after: 1 week
Sponsored by: Mellanox Technologies
Notes
Notes:
svn path=/head/; revision=360127
Diffstat (limited to 'sys/compat/linuxkpi/common/include/asm')
-rw-r--r-- | sys/compat/linuxkpi/common/include/asm/atomic-long.h | 14 | ||||
-rw-r--r-- | sys/compat/linuxkpi/common/include/asm/atomic.h | 14 | ||||
-rw-r--r-- | sys/compat/linuxkpi/common/include/asm/atomic64.h | 14 |
3 files changed, 42 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/asm/atomic-long.h b/sys/compat/linuxkpi/common/include/asm/atomic-long.h index 108d7f4f7b3a..e2bea06c0953 100644 --- a/sys/compat/linuxkpi/common/include/asm/atomic-long.h +++ b/sys/compat/linuxkpi/common/include/asm/atomic-long.h @@ -111,6 +111,20 @@ atomic_long_add_unless(atomic_long_t *v, long a, long u) } static inline long +atomic_long_fetch_add_unless(atomic_long_t *v, long a, long u) +{ + long c = atomic_long_read(v); + + for (;;) { + if (unlikely(c == u)) + break; + if (likely(atomic_fcmpset_long(&v->counter, &c, c + a))) + break; + } + return (c); +} + +static inline long atomic_long_dec_and_test(atomic_long_t *v) { long i = atomic_long_add(-1, v); diff --git a/sys/compat/linuxkpi/common/include/asm/atomic.h b/sys/compat/linuxkpi/common/include/asm/atomic.h index f9a9149186a3..fff06f61d856 100644 --- a/sys/compat/linuxkpi/common/include/asm/atomic.h +++ b/sys/compat/linuxkpi/common/include/asm/atomic.h @@ -119,6 +119,20 @@ atomic_add_unless(atomic_t *v, int a, int u) return (c != u); } +static inline int +atomic_fetch_add_unless(atomic_t *v, int a, int u) +{ + int c = atomic_read(v); + + for (;;) { + if (unlikely(c == u)) + break; + if (likely(atomic_fcmpset_int(&v->counter, &c, c + a))) + break; + } + return (c); +} + static inline void atomic_clear_mask(unsigned int mask, atomic_t *v) { diff --git a/sys/compat/linuxkpi/common/include/asm/atomic64.h b/sys/compat/linuxkpi/common/include/asm/atomic64.h index 7ba3e9792007..c60117b5cb8c 100644 --- a/sys/compat/linuxkpi/common/include/asm/atomic64.h +++ b/sys/compat/linuxkpi/common/include/asm/atomic64.h @@ -104,6 +104,20 @@ atomic64_add_unless(atomic64_t *v, int64_t a, int64_t u) } static inline int64_t +atomic64_fetch_add_unless(atomic64_t *v, int64_t a, int64_t u) +{ + int64_t c = atomic64_read(v); + + for (;;) { + if (unlikely(c == u)) + break; + if (likely(atomic_fcmpset_64(&v->counter, &c, c + a))) + break; + } + return (c); +} + +static inline int64_t atomic64_xchg(atomic64_t *v, int64_t i) { #if !((defined(__mips__) && !(defined(__mips_n32) || defined(__mips_n64))) || \ |