diff options
| author | Heiko Carstens <hca@linux.ibm.com> | 2023-02-13 12:35:18 +0100 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2023-02-15 11:07:01 +0100 |
| commit | f96f41aae2b5bd34d32f462c7b45c0f4fad2b59e (patch) | |
| tree | df5d5a0ad3e9718943b226116b8d4034068b08ed | |
| parent | b977f03ec44aef7f6728bfe1a48f3ee5b0776001 (diff) | |
s390/processor: add test_and_set_cpu_flag() and test_and_clear_cpu_flag()
Add test_and_set_cpu_flag() and test_and_clear_cpu_flag() helper functions.
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
| -rw-r--r-- | arch/s390/include/asm/processor.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 9f89d3821d16..e98d9650764b 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -59,6 +59,22 @@ static __always_inline bool test_cpu_flag(int flag) return S390_lowcore.cpu_flags & (1UL << flag); } +static __always_inline bool test_and_set_cpu_flag(int flag) +{ + if (test_cpu_flag(flag)) + return true; + set_cpu_flag(flag); + return false; +} + +static __always_inline bool test_and_clear_cpu_flag(int flag) +{ + if (!test_cpu_flag(flag)) + return false; + clear_cpu_flag(flag); + return true; +} + /* * Test CIF flag of another CPU. The caller needs to ensure that * CPU hotplug can not happen, e.g. by disabling preemption. |