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coredump masking: reimplementation of dumpable using two flags

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This patch changes mm_struct.dumpable to a pair of bit flags.

set_dumpable() converts three-value dumpable to two flags and stores it into
lower two bits of mm_struct.flags instead of mm_struct.dumpable.
get_dumpable() behaves in the opposite way.

[akpm@linux-foundation.org: export set_dumpable]
Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: David Howells <dhowells@redhat.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kawai, Hidehiro
2007-07-19 01:48:27 -07:00
committed by Linus Torvalds
parent 76fdbb25f9
commit 6c5d523826
8 changed files with 82 additions and 25 deletions
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2
fs/proc/base.c
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@@ -1014,7 +1014,7 @@ static int task_dumpable(struct task_struct *task)
task_lock(task);
mm = task->mm;
if (mm)
dumpable = mm->dumpable;
dumpable = get_dumpable(mm);
task_unlock(task);
if(dumpable == 1)
return 1;