Messages in this thread Patch in this message | | | From | Richard Weinberger <> | Subject | [PATCH v2] Call arch_pick_mmap_layout() only once | Date | Tue, 14 Jan 2014 18:27:52 +0100 |
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Currently both setup_new_exec() and flush_old_exec() issue a call to arch_pick_mmap_layout(). As setup_new_exec() and flush_old_exec() are always called pairwise arch_pick_mmap_layout() is called twice.
This patch removes one call from setup_new_exec() to have it only called once.
Tested-by: Pat Erley <pat-lkml@erley.org> Signed-off-by: Richard Weinberger <richard@nod.at> --- Changes between v1 and v2:
Pat reported that v1 broke IA32 emulation on x86_64. It turned out that we have to keep the second call to arch_pick_mmap_layout() and are free to remove the first one. v1 did it the other way around. This is needed because only the latter call will see all current->personality flags.
diff --git a/fs/exec.c b/fs/exec.c index 7ea097f..a733599 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -843,7 +843,6 @@ static int exec_mmap(struct mm_struct *mm) tsk->active_mm = mm; activate_mm(active_mm, mm); task_unlock(tsk); - arch_pick_mmap_layout(mm); if (old_mm) { up_read(&old_mm->mmap_sem); BUG_ON(active_mm != old_mm); -- 1.8.4.2
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