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task_struct cleanup: move binfmt field to mm_struct

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Because the binfmt is not different between threads in the same process,
it can be moved from task_struct to mm_struct.  And binfmt moudle is
handled per mm_struct instead of task_struct.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hiroshi Shimamoto
2009-09-23 15:57:41 -07:00
committed by Linus Torvalds
parent 2fa4341074
commit 801460d0cf
5 changed files with 15 additions and 13 deletions
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10
fs/exec.c
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@ -1397,10 +1397,12 @@ out_ret:
void set_binfmt(struct linux_binfmt *new)
{
if (current->binfmt)
module_put(current->binfmt->module);
struct mm_struct *mm = current->mm;
current->binfmt = new;
if (mm->binfmt)
module_put(mm->binfmt->module);
mm->binfmt = new;
if (new)
__module_get(new->module);
}
@ -1770,7 +1772,7 @@ void do_coredump(long signr, int exit_code, struct pt_regs *regs)
audit_core_dumps(signr);
binfmt = current->binfmt;
binfmt = mm->binfmt;
if (!binfmt || !binfmt->core_dump)
goto fail;