[PATCH 2/5] mm: huge_memory: Convert remaining use of sprintf to sysfs_emit and neatening

From: Joe Perches
Date: Sun Nov 01 2020 - 15:13:05 EST


Convert the only use of sprintf with struct kobject * that the cocci
script could not convert.

Miscellanea:

o Neaten the uses of a constant string with sysfs_emit to use a const
char * to reduce overall object size

Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
---
mm/huge_memory.c | 52 +++++++++++++++++++++++++++++-------------------
1 file changed, 31 insertions(+), 21 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 44826bf3d9ff..0436ecb2326c 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -163,12 +163,17 @@ static struct shrinker huge_zero_page_shrinker = {
static ssize_t enabled_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
+ const char *output;
+
if (test_bit(TRANSPARENT_HUGEPAGE_FLAG, &transparent_hugepage_flags))
- return sysfs_emit(buf, "[always] madvise never\n");
- else if (test_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, &transparent_hugepage_flags))
- return sysfs_emit(buf, "always [madvise] never\n");
+ output = "[always] madvise never";
+ else if (test_bit(TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG,
+ &transparent_hugepage_flags))
+ output = "always [madvise] never";
else
- return sysfs_emit(buf, "always madvise [never]\n");
+ output = "always madvise [never]";
+
+ return sysfs_emit(buf, "%s\n", output);
}

static ssize_t enabled_store(struct kobject *kobj,
@@ -200,11 +205,11 @@ static struct kobj_attribute enabled_attr =
__ATTR(enabled, 0644, enabled_show, enabled_store);

ssize_t single_hugepage_flag_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf,
- enum transparent_hugepage_flag flag)
+ struct kobj_attribute *attr, char *buf,
+ enum transparent_hugepage_flag flag)
{
- return sprintf(buf, "%d\n",
- !!test_bit(flag, &transparent_hugepage_flags));
+ return sysfs_emit(buf, "%d\n",
+ !!test_bit(flag, &transparent_hugepage_flags));
}

ssize_t single_hugepage_flag_store(struct kobject *kobj,
@@ -232,19 +237,24 @@ ssize_t single_hugepage_flag_store(struct kobject *kobj,
static ssize_t defrag_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
- if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, &transparent_hugepage_flags))
- return sysfs_emit(buf,
- "[always] defer defer+madvise madvise never\n");
- if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, &transparent_hugepage_flags))
- return sysfs_emit(buf,
- "always [defer] defer+madvise madvise never\n");
- if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, &transparent_hugepage_flags))
- return sysfs_emit(buf,
- "always defer [defer+madvise] madvise never\n");
- if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, &transparent_hugepage_flags))
- return sysfs_emit(buf,
- "always defer defer+madvise [madvise] never\n");
- return sysfs_emit(buf, "always defer defer+madvise madvise [never]\n");
+ const char *output;
+
+ if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG,
+ &transparent_hugepage_flags))
+ output = "[always] defer defer+madvise madvise never";
+ else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG,
+ &transparent_hugepage_flags))
+ output = "always [defer] defer+madvise madvise never";
+ else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG,
+ &transparent_hugepage_flags))
+ output = "always defer [defer+madvise] madvise never";
+ else if (test_bit(TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG,
+ &transparent_hugepage_flags))
+ output = "always defer defer+madvise [madvise] never";
+ else
+ output = "always defer defer+madvise madvise [never]";
+
+ return sysfs_emit(buf, "%s\n", output);
}

static ssize_t defrag_store(struct kobject *kobj,
--
2.26.0