fs: use rlimit helpers

Make sure compiler won't do weird things with limits.  E.g.  fetching them
twice may return 2 different values after writable limits are implemented.

I.e.  either use rlimit helpers added in commit 3e10e716abf3 ("resource:
add helpers for fetching rlimits") or ACCESS_ONCE if not applicable.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/fs/select.c b/fs/select.c
index fd38ce2e32e3..73715e90030f 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -821,7 +821,7 @@ int do_sys_poll(struct pollfd __user *ufds, unsigned int nfds,
         struct poll_list *walk = head;
         unsigned long todo = nfds;
 
-        if (nfds > current->signal->rlim[RLIMIT_NOFILE].rlim_cur)
+        if (nfds > rlimit(RLIMIT_NOFILE))
                 return -EINVAL;
 
         len = min_t(unsigned int, nfds, N_STACK_PPS);