coredump: shift down_write(mmap_sem) into coredump_wait()
- move the cprm.mm_flags checks up, before we take mmap_sem
- move down_write(mmap_sem) and ->core_state check from do_coredump()
to coredump_wait()
This simplifies the code and makes the locking symmetrical.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 file changed