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authorAlexey Dobriyan <adobriyan@gmail.com>2009-09-24 00:57:32 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-24 16:21:05 +0200
commit858f09930b32c11b40fd0c5c467982ba09b10894 (patch)
tree43972de84d69d61904f4f24ff78f99a3a82c2ff3 /kernel/fork.c
parentmemstick: move dev_dbg (diff)
downloadlinux-858f09930b32c11b40fd0c5c467982ba09b10894.tar.xz
linux-858f09930b32c11b40fd0c5c467982ba09b10894.zip
aio: ifdef fields in mm_struct
->ioctx_lock and ->ioctx_list are used only under CONFIG_AIO. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Zach Brown <zach.brown@oracle.com> Cc: Benjamin LaHaise <bcrl@kvack.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
-rw-r--r--kernel/fork.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index b51fd2ccb2f1..e49f181ba1ca 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -434,6 +434,14 @@ __setup("coredump_filter=", coredump_filter_setup);
#include <linux/init_task.h>
+static void mm_init_aio(struct mm_struct *mm)
+{
+#ifdef CONFIG_AIO
+ spin_lock_init(&mm->ioctx_lock);
+ INIT_HLIST_HEAD(&mm->ioctx_list);
+#endif
+}
+
static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p)
{
atomic_set(&mm->mm_users, 1);
@@ -447,10 +455,9 @@ static struct mm_struct * mm_init(struct mm_struct * mm, struct task_struct *p)
set_mm_counter(mm, file_rss, 0);
set_mm_counter(mm, anon_rss, 0);
spin_lock_init(&mm->page_table_lock);
- spin_lock_init(&mm->ioctx_lock);
- INIT_HLIST_HEAD(&mm->ioctx_list);
mm->free_area_cache = TASK_UNMAPPED_BASE;
mm->cached_hole_size = ~0UL;
+ mm_init_aio(mm);
mm_init_owner(mm, p);
if (likely(!mm_alloc_pgd(mm))) {