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ext4: eliminate sleep from shutdown ioctl 

The msleep() when processing EXT4_GOING_FLAGS_NOLOGFLUSH was a hack to
avoid some races (that are now fixed), but in fact it introduced its
own race.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
This commit is contained in:
Theodore Ts'o 2018-02-18 23:16:28 -05:00
parent 576d18ed60
commit a6d9946bb9
1 changed files with 1 additions and 3 deletions
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4
fs/ext4/ioctl.c
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@ -498,10 +498,8 @@ static int ext4_shutdown(struct super_block *sb, unsigned long arg)
break;
case EXT4_GOING_FLAGS_NOLOGFLUSH:
set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) {
msleep(100);
if (sbi->s_journal && !is_journal_aborted(sbi->s_journal))
jbd2_journal_abort(sbi->s_journal, 0);
}
break;
default:
return -EINVAL;