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authorAkinobu Mita <akinobu.mita@gmail.com>2011-07-26 16:09:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-26 16:49:46 -0700
commitb2588c4b4c3c075e9b45d61065d86c60de2b6441 (patch)
tree66942e8a252101aaa7e1f0a2ee2c3d8288dda659
parent810f09b87b75d7cc3906ffffe4311003f37caa2a (diff)
fail_page_alloc: simplify debugfs initialization
Now cleanup_fault_attr_dentries() recursively removes a directory, So we can simplify the error handling in the initialization code and no need to hold dentry structs for each debugfs file. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/page_alloc.c47
1 files changed, 16 insertions, 31 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 72c6820a345c..1dbcf8888f14 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1370,21 +1370,12 @@ failed:
#ifdef CONFIG_FAIL_PAGE_ALLOC
-static struct fail_page_alloc_attr {
+static struct {
struct fault_attr attr;
u32 ignore_gfp_highmem;
u32 ignore_gfp_wait;
u32 min_order;
-
-#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
-
- struct dentry *ignore_gfp_highmem_file;
- struct dentry *ignore_gfp_wait_file;
- struct dentry *min_order_file;
-
-#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
-
} fail_page_alloc = {
.attr = FAULT_ATTR_INITIALIZER,
.ignore_gfp_wait = 1,
@@ -1424,30 +1415,24 @@ static int __init fail_page_alloc_debugfs(void)
"fail_page_alloc");
if (err)
return err;
+
dir = fail_page_alloc.attr.dir;
- fail_page_alloc.ignore_gfp_wait_file =
- debugfs_create_bool("ignore-gfp-wait", mode, dir,
- &fail_page_alloc.ignore_gfp_wait);
-
- fail_page_alloc.ignore_gfp_highmem_file =
- debugfs_create_bool("ignore-gfp-highmem", mode, dir,
- &fail_page_alloc.ignore_gfp_highmem);
- fail_page_alloc.min_order_file =
- debugfs_create_u32("min-order", mode, dir,
- &fail_page_alloc.min_order);
-
- if (!fail_page_alloc.ignore_gfp_wait_file ||
- !fail_page_alloc.ignore_gfp_highmem_file ||
- !fail_page_alloc.min_order_file) {
- err = -ENOMEM;
- debugfs_remove(fail_page_alloc.ignore_gfp_wait_file);
- debugfs_remove(fail_page_alloc.ignore_gfp_highmem_file);
- debugfs_remove(fail_page_alloc.min_order_file);
- cleanup_fault_attr_dentries(&fail_page_alloc.attr);
- }
+ if (!debugfs_create_bool("ignore-gfp-wait", mode, dir,
+ &fail_page_alloc.ignore_gfp_wait))
+ goto fail;
+ if (!debugfs_create_bool("ignore-gfp-highmem", mode, dir,
+ &fail_page_alloc.ignore_gfp_highmem))
+ goto fail;
+ if (!debugfs_create_u32("min-order", mode, dir,
+ &fail_page_alloc.min_order))
+ goto fail;
+
+ return 0;
+fail:
+ cleanup_fault_attr_dentries(&fail_page_alloc.attr);
- return err;
+ return -ENOMEM;
}
late_initcall(fail_page_alloc_debugfs);

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