From: Khazhismel Kumykov khazhy@google.com
[ Upstream commit ac081c3be3fae6d0cc3e1862507fca3862d30b67 ]
On non-preempt kernels this loop can take a long time (more than 50 ticks) processing through entries.
Link: http://lkml.kernel.org/r/20181010172623.57033-1-khazhy@google.com Signed-off-by: Khazhismel Kumykov khazhy@google.com Acked-by: OGAWA Hirofumi hirofumi@mail.parknet.co.jp Reviewed-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Sasha Levin sashal@kernel.org --- fs/fat/fatent.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c index 3aef8630a4b9..95d2c716e0da 100644 --- a/fs/fat/fatent.c +++ b/fs/fat/fatent.c @@ -681,6 +681,7 @@ int fat_count_free_clusters(struct super_block *sb) if (ops->ent_get(&fatent) == FAT_ENT_FREE) free++; } while (fat_ent_next(sbi, &fatent)); + cond_resched(); } sbi->free_clusters = free; sbi->free_clus_valid = 1;