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Subject[PATCH -mm] proc: fixup test for read
/proc/kmsg can and will block if read under root.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
---

tools/testing/selftests/proc/read.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/tools/testing/selftests/proc/read.c
+++ b/tools/testing/selftests/proc/read.c
@@ -54,7 +54,8 @@ static void f_reg(DIR *d, const char *filename)
int fd;
ssize_t rv;

- fd = openat(dirfd(d), filename, O_RDONLY);
+ /* read from /proc/kmsg can block */
+ fd = openat(dirfd(d), filename, O_RDONLY|O_NONBLOCK);
if (fd == -1)
return;
rv = read(fd, buf, sizeof(buf));
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