VisionFive2 Linux kernel

StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)

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author: Al Viro <viro@ZenIV.linux.org.uk> 2015-09-09 10:16:39 +0100 committer: Linus Torvalds <torvalds@linux-foundation.org> 2015-09-09 10:43:12 -0700 commit: bd2843fe1f29f6145c623ae9390f144cefaa611d parent: daf0e1ed578f65e8395102549e135887e6661860
Commit Summary:
fix ufs write vs readpage race when writing into a hole
Diffstat:
1 file changed, 2 insertions, 2 deletions
diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c
index fb8b54eb77c5..dc5fae601c24 100644
--- a/fs/ufs/balloc.c
+++ b/fs/ufs/balloc.c
@@ -417,14 +417,14 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
 	if (oldcount == 0) {
 		result = ufs_alloc_fragments (inode, cgno, goal, count, err);
 		if (result) {
+			ufs_clear_frags(inode, result + oldcount,
+					newcount - oldcount, locked_page != NULL);
 			write_seqlock(&UFS_I(inode)->meta_lock);
 			ufs_cpu_to_data_ptr(sb, p, result);
 			write_sequnlock(&UFS_I(inode)->meta_lock);
 			*err = 0;
 			UFS_I(inode)->i_lastfrag =
 				max(UFS_I(inode)->i_lastfrag, fragment + count);
-			ufs_clear_frags(inode, result + oldcount,
-					newcount - oldcount, locked_page != NULL);
 		}
 		mutex_unlock(&UFS_SB(sb)->s_lock);
 		UFSD("EXIT, result %llu\n", (unsigned long long)result);