xiaomi-sm8450/android_kernel_xiaomi_sm8450
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parallel lookups: actual switch to rwsem

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ta-da!

The main issue is the lack of down_write_killable(), so the places
like readdir.c switched to plain inode_lock(); once killable
variants of rwsem primitives appear, that'll be dealt with.

lockdep side also might need more work

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2016-04-15 15:08:36 -04:00
parent d9171b9345
commit 9902af79c0
11 changed files with 73 additions and 32 deletions
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4
fs/overlayfs/readdir.c
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@@ -218,7 +218,9 @@ static int ovl_check_whiteouts(struct dentry *dir, struct ovl_readdir_data *rdd)
cap_raise(override_cred->cap_effective, CAP_DAC_OVERRIDE);
old_cred = override_creds(override_cred);
err = mutex_lock_killable(&dir->d_inode->i_mutex);
inode_lock(dir->d_inode);
err = 0;
// XXX: err = mutex_lock_killable(&dir->d_inode->i_mutex);
if (!err) {
while (rdd->first_maybe_whiteout) {
p = rdd->first_maybe_whiteout;