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proc: do mmput ASAP for /proc/*/map_files

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mm_struct is not needed while printing as all the data was already
extracted.

Link: http://lkml.kernel.org/r/20180309223120.GC3843@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan 2018-04-10 16:32:05 -07:00 committed by Linus Torvalds
parent 58c501aab3
commit fe079a5e10
1 changed files with 1 additions and 1 deletions
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fs/proc/base.c
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@ -2211,6 +2211,7 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
}
}
up_read(&mm->mmap_sem);
mmput(mm);
for (i = 0; i < nr_files; i++) {
char buf[4 * sizeof(long) + 2]; /* max: %lx-%lx\0 */
@ -2228,7 +2229,6 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
}
if (fa)
flex_array_free(fa);
mmput(mm);
out_put_task:
put_task_struct(task);