| commit | 8b19e34188a32d63a7da94ea8a3f5e39b0c66050 | [log] [tgz] |
|---|---|---|
| author | Linus Torvalds <torvalds@linux-foundation.org> | Thu Sep 12 10:35:47 2013 -0700 |
| committer | Linus Torvalds <torvalds@linux-foundation.org> | Thu Sep 12 10:35:47 2013 -0700 |
| tree | b6affbe820569551bebfd39cc07965855080d2c1 | |
| parent | 5762482f5496cb1dd86acd2aace3ea25d1404e1f [diff] |
vfs: make getcwd() get the root and pwd path under rcu This allows us to skip all the crazy spinlocks and reference count updates, and instead use the fs sequence read-lock to get an atomic snapshot of the root and cwd information. We might want to make the rule that "prepend_path()" is always called with the RCU lock held, but the RCU lock nests fine and this is the minimal fix. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>