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| author | Kurt Kanzenbach <kurt@linutronix.de> | 2021-06-25 10:10:59 +0200 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-10-01 08:09:13 -0300 |
| commit | dd5adb515c105e4ad1619825babe85d75a7a755c (patch) | |
| tree | 5f855ab7385173e8d0501bbda457574a2a1a4947 | |
| parent | 01d34e934a395675ba3c576f2a51f10b86efbc20 (diff) | |
| download | glibc-dd5adb515c105e4ad1619825babe85d75a7a755c.zip glibc-dd5adb515c105e4ad1619825babe85d75a7a755c.tar.gz glibc-dd5adb515c105e4ad1619825babe85d75a7a755c.tar.bz2 | |
Linux: Add FUTEX_LOCK_PI2
Linux v5.14.0 introduced a new futex operation called FUTEX_LOCK_PI2.
This kernel feature can be used to implement
pthread_mutex_clocklock(MONOTONIC)/PI.
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
| -rw-r--r-- | sysdeps/unix/sysv/linux/kernel-features.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h index 3930e14..ffb6af1 100644 --- a/sysdeps/unix/sysv/linux/kernel-features.h +++ b/sysdeps/unix/sysv/linux/kernel-features.h @@ -220,4 +220,12 @@ # define __ASSUME_FACCESSAT2 0 #endif +/* The FUTEX_LOCK_PI2 operation was introduced across all architectures in Linux + 5.14. */ +#if __LINUX_KERNEL_VERSION >= 0x050e00 +# define __ASSUME_FUTEX_LOCK_PI2 1 +#else +# define __ASSUME_FUTEX_LOCK_PI2 0 +#endif + #endif /* kernel-features.h */ |