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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-12 19:35:47 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-09-12 19:35:47 +0200 |
| commit | 8b19e34188a32d63a7da94ea8a3f5e39b0c66050 (patch) | |
| tree | b6affbe820569551bebfd39cc07965855080d2c1 /kernel | |
| parent | vfs: move get_fs_root_and_pwd() to single caller (diff) | |
| download | linux-8b19e34188a32d63a7da94ea8a3f5e39b0c66050.tar.xz linux-8b19e34188a32d63a7da94ea8a3f5e39b0c66050.zip | |
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>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions