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fs/fat/fatent.c: add cond_resched() to fat_count_free_clusters()
[ Upstream commit ac081c3be3
]
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>
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@ -681,6 +681,7 @@ int fat_count_free_clusters(struct super_block *sb)
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if (ops->ent_get(&fatent) == FAT_ENT_FREE)
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free++;
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} while (fat_ent_next(sbi, &fatent));
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cond_resched();
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}
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sbi->free_clusters = free;
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sbi->free_clus_valid = 1;
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