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mm: nommu: correct the range of mmap_sem_read_lock in task_mem()

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During the seq_printf,the mmap_sem_read_lock protection is not
required.

Link: https://lkml.kernel.org/r/20230622040152.1173-1-lipeifeng@oppo.com
Signed-off-by: lipeifeng <lipeifeng@oppo.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
lipeifeng
2023-06-22 12:01:52 +08:00
committed by Andrew Morton
parent fd4aed8d98
commit 341d51c886
1 changed files with 3 additions and 3 deletions
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6
fs/proc/task_nommu.c
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@@ -51,7 +51,7 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
sbytes += kobjsize(mm);
else
bytes += kobjsize(mm);
if (current->fs && current->fs->users > 1)
sbytes += kobjsize(current->fs);
else
@@ -69,13 +69,13 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
bytes += kobjsize(current); /* includes kernel stack */
mmap_read_unlock(mm);
seq_printf(m,
"Mem:\t%8lu bytes\n"
"Slack:\t%8lu bytes\n"
"Shared:\t%8lu bytes\n",
bytes, slack, sbytes);
mmap_read_unlock(mm);
}
unsigned long task_vsize(struct mm_struct *mm)