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author | Vladimir Davydov <vdavydov@parallels.com> | 2014-08-08 14:21:56 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-08 15:57:23 -0700 |
commit | 41f727fde1fe40efeb4fef6fdce74ff794be5aeb (patch) | |
tree | b4946b74270cfe286580f44659000aef0d204277 /fs | |
parent | 8f053ac11f96cc6edcabcbb154c9cf06c5d63333 (diff) | |
download | linux-stable-41f727fde1fe40efeb4fef6fdce74ff794be5aeb.tar.gz linux-stable-41f727fde1fe40efeb4fef6fdce74ff794be5aeb.tar.bz2 linux-stable-41f727fde1fe40efeb4fef6fdce74ff794be5aeb.zip |
fork/exec: cleanup mm initialization
mm initialization on fork/exec is spread all over the place, which makes
the code look inconsistent.
We have mm_init(), which is supposed to init/nullify mm's internals, but
it doesn't init all the fields it should:
- on fork ->mmap,mm_rb,vmacache_seqnum,map_count,mm_cpumask,locked_vm
are zeroed in dup_mmap();
- on fork ->pmd_huge_pte is zeroed in dup_mm(), immediately before
calling mm_init();
- ->cpu_vm_mask_var ptr is initialized by mm_init_cpumask(), which is
called before mm_init() on both fork and exec;
- ->context is initialized by init_new_context(), which is called after
mm_init() on both fork and exec;
Let's consolidate all the initializations in mm_init() to make the code
look cleaner.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/exec.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/fs/exec.c b/fs/exec.c index ab1f1200ce5d..a2b42a98c743 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -368,10 +368,6 @@ static int bprm_mm_init(struct linux_binprm *bprm) if (!mm) goto err; - err = init_new_context(current, mm); - if (err) - goto err; - err = __bprm_mm_init(bprm); if (err) goto err; |