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| author | Chao Yu <chao2.yu@samsung.com> | 2015-12-15 17:19:26 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-12-16 08:58:06 -0800 |
| commit | e8240f656d4d5d718ce8cf6b4ea266d6719ef547 (patch) | |
| tree | 549a1fef4054135862d7ee7dd26ef74af0f173f7 /fs/f2fs/file.c | |
| parent | b39f0de23d8f22253d441b3b68414e9a1d027cf6 (diff) | |
| download | linux-e8240f656d4d5d718ce8cf6b4ea266d6719ef547.tar.gz linux-e8240f656d4d5d718ce8cf6b4ea266d6719ef547.tar.bz2 linux-e8240f656d4d5d718ce8cf6b4ea266d6719ef547.zip | |
f2fs: don't grab super block buffer header all the time
We have already got one copy of valid super block in memory, do not grab
buffer header of super block all the time.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/file.c')
| -rw-r--r-- | fs/f2fs/file.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 1f5892f38018..7f8ca47be0af 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -1591,20 +1591,16 @@ static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg) return err; /* update superblock with uuid */ - lock_buffer(sbi->raw_super_buf); generate_random_uuid(sbi->raw_super->encrypt_pw_salt); - unlock_buffer(sbi->raw_super_buf); err = f2fs_commit_super(sbi, false); - - mnt_drop_write_file(filp); if (err) { /* undo new data */ - lock_buffer(sbi->raw_super_buf); memset(sbi->raw_super->encrypt_pw_salt, 0, 16); - unlock_buffer(sbi->raw_super_buf); + mnt_drop_write_file(filp); return err; } + mnt_drop_write_file(filp); got_it: if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt, 16)) |