The following commit has been merged into the core/rcu branch of tip:
Commit-ID: 5b1c827ca3b349801e2faff4185118cfa74f94c6
Gitweb: https://git.kernel.org/tip/5b1c827ca3b349801e2faff4185118cfa74f94c6
Author: Willy Tarreau <w@xxxxxx>
AuthorDate: Thu, 21 Jan 2021 08:20:27 +01:00
Committer: Paul E. McKenney <paulmck@xxxxxxxxxx>
CommitterDate: Thu, 21 Jan 2021 10:06:44 -08:00
tools/nolibc: Implement poll() based on ppoll()
Some architectures like arm64 do not implement poll() and have to use
ppoll() instead. This commit therefore makes poll() use ppoll() when
available. This is a port of nolibc's upstream commit 800f75c13ede to
the Linux kernel.
Fixes: 66b6f755ad45 ("rcutorture: Import a copy of nolibc")
Tested-by: Valentin Schneider <valentin.schneider@xxxxxxx>
Tested-by: Mark Rutland <mark.rutland@xxxxxxx> [arm64]
Signed-off-by: Willy Tarreau <w@xxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
tools/include/nolibc/nolibc.h | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h
index fdd5524..833693f 100644
--- a/tools/include/nolibc/nolibc.h
+++ b/tools/include/nolibc/nolibc.h
@@ -1652,7 +1652,17 @@ int sys_pivot_root(const char *new, const char *old)
static __attribute__((unused))
int sys_poll(struct pollfd *fds, int nfds, int timeout)
{
+#if defined(__NR_ppoll)
+ struct timespec t;
+
+ if (timeout >= 0) {
+ t.tv_sec = timeout / 1000;
+ t.tv_nsec = (timeout % 1000) * 1000000;
+ }
+ return my_syscall4(__NR_ppoll, fds, nfds, (timeout >= 0) ? &t : NULL, NULL);
+#else
return my_syscall3(__NR_poll, fds, nfds, timeout);
+#endif
}
static __attribute__((unused))
|