[PATCH -next] powerpc/powernv: Fix debugfs_simple_attr.cocci warnings

[YueHaibing]

Use DEFINE_DEBUGFS_ATTRIBUTE rather than DEFINE_SIMPLE_ATTRIBUTE
for debugfs files.

Semantic patch information:
Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file()
imposes some significant overhead as compared to
DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe().

Generated by: scripts/coccinelle/api/debugfs/debugfs_simple_attr.cocci

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 arch/powerpc/platforms/powernv/memtrace.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/memtrace.c 
b/arch/powerpc/platforms/powernv/memtrace.c
index 84d038e..0cb6548 100644
--- a/arch/powerpc/platforms/powernv/memtrace.c
+++ b/arch/powerpc/platforms/powernv/memtrace.c
@@ -311,8 +311,8 @@ static int memtrace_enable_get(void *data, u64 *val)
        return 0;
 }
 
-DEFINE_SIMPLE_ATTRIBUTE(memtrace_init_fops, memtrace_enable_get,
-                                       memtrace_enable_set, "0x%016llx\n");
+DEFINE_DEBUGFS_ATTRIBUTE(memtrace_init_fops, memtrace_enable_get,
+                        memtrace_enable_set, "0x%016llx\n");
 
 static int memtrace_init(void)
 {
@@ -321,8 +321,8 @@ static int memtrace_init(void)
        if (!memtrace_debugfs_dir)
                return -1;
 
-       debugfs_create_file("enable", 0600, memtrace_debugfs_dir,
-                           NULL, &memtrace_init_fops);
+       debugfs_create_file_unsafe("enable", 0600, memtrace_debugfs_dir, NULL,
+                                  &memtrace_init_fops);
 
        return 0;
 }