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| author | Alex Shi <alex.shi@linaro.org> | 2016-03-14 15:37:56 +0800 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2016-03-14 15:37:56 +0800 |
| commit | 0f7fc48d4378ac087ef7e69a6e675b0d9280999e (patch) | |
| tree | f0c005b00166eca0ce2648487cde89866447645f /fs/jffs2/README.Locking | |
| parent | 4fc0eccae84a29106ed944588ba641e9039ccfbc (diff) | |
| parent | fbb0b56de45bc81681eeeaec29e6c1e3ff12a200 (diff) | |
Merge branch 'linux-linaro-lsk-v3.10' into linux-linaro-lsk-v3.10-androidlsk-v3.10-16.03-androidlinux-linaro-lsk-v3.10-android
Diffstat (limited to 'fs/jffs2/README.Locking')
| -rw-r--r-- | fs/jffs2/README.Locking | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/fs/jffs2/README.Locking b/fs/jffs2/README.Locking index 3ea36554107f..8918ac905a3b 100644 --- a/fs/jffs2/README.Locking +++ b/fs/jffs2/README.Locking @@ -2,10 +2,6 @@ JFFS2 LOCKING DOCUMENTATION --------------------------- -At least theoretically, JFFS2 does not require the Big Kernel Lock -(BKL), which was always helpfully obtained for it by Linux 2.4 VFS -code. It has its own locking, as described below. - This document attempts to describe the existing locking rules for JFFS2. It is not expected to remain perfectly up to date, but ought to be fairly close. @@ -69,6 +65,7 @@ Ordering constraints: any f->sem held. 2. Never attempt to lock two file mutexes in one thread. No ordering rules have been made for doing so. + 3. Never lock a page cache page with f->sem held. erase_completion_lock spinlock |