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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-07-10 13:50:56 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-09-11 14:42:02 -0300 |
| commit | 60a2e28b34b41e1a4e50feec7b38e068c9e33eec (patch) | |
| tree | 4843d9458e1055a8c1850c0fc7f0bc172eaba30a | |
| parent | ecdcafa571ba68e081e9cfcdda4ea8c1a9dbdf0d (diff) | |
| download | glibc-60a2e28b34b41e1a4e50feec7b38e068c9e33eec.tar.gz glibc-60a2e28b34b41e1a4e50feec7b38e068c9e33eec.tar.xz glibc-60a2e28b34b41e1a4e50feec7b38e068c9e33eec.zip | |
linux: Add ppoll time64 optimization
It avoid continuing issue the __NR_ppoll_time64 syscall once the kernel advertise it does not support it. Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15 kernel). Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
| -rw-r--r-- | sysdeps/unix/sysv/linux/ppoll.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/sysdeps/unix/sysv/linux/ppoll.c b/sysdeps/unix/sysv/linux/ppoll.c index dd2167fc55..e68a153427 100644 --- a/sysdeps/unix/sysv/linux/ppoll.c +++ b/sysdeps/unix/sysv/linux/ppoll.c @@ -22,6 +22,7 @@ #include <sys/poll.h> #include <sysdep-cancel.h> #include <kernel-features.h> +#include <time64-support.h> int @@ -37,16 +38,23 @@ __ppoll64 (struct pollfd *fds, nfds_t nfds, const struct __timespec64 *timeout, timeout = &tval; } + int ret; + + if (supports_time64 ()) + { #ifndef __NR_ppoll_time64 # define __NR_ppoll_time64 __NR_ppoll #endif - int ret = SYSCALL_CANCEL (ppoll_time64, fds, nfds, timeout, sigmask, - __NSIG_BYTES); + ret = SYSCALL_CANCEL (ppoll_time64, fds, nfds, timeout, sigmask, + __NSIG_BYTES); -#ifndef __ASSUME_TIME64_SYSCALLS - if (ret >= 0 || errno != ENOSYS) - return ret; + if (ret == 0 || errno != ENOSYS) + return ret; + mark_time64_unsupported (); + } + +#ifndef __ASSUME_TIME64_SYSCALLS struct timespec ts32; if (timeout) { |