From: Joe Perches <joe@perches.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/5] mm: huge_memory: Convert remaining use of sprintf to sysfs_emit and neatening
Date: Sun, 1 Nov 2020 12:12:49 -0800 [thread overview]
Message-ID: <f473c28fea9303d411776d1daaaed01cbce147bf.1604261483.git.joe@perches.com> (raw)
In-Reply-To: <cover.1604261483.git.joe@perches.com>
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@perches.com>
---
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
next prev parent reply other threads:[~2020-11-01 20:13 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-01 20:12 [PATCH 0/5] mm: Convert sysfs sprintf family to sysfs_emit Joe Perches
2020-11-01 20:12 ` [PATCH 1/5] mm: Use sysfs_emit for struct kobject * uses Joe Perches
2020-11-01 20:12 ` Joe Perches [this message]
2020-11-01 20:12 ` [PATCH 3/5] mm:backing-dev: Use sysfs_emit in macro defining functions Joe Perches
2020-11-01 20:12 ` [PATCH 4/5] mm: shmem: Convert shmem_enabled_show to use sysfs_emit_at Joe Perches
2020-11-01 20:48 ` Matthew Wilcox
2020-11-01 21:04 ` Joe Perches
2020-11-01 21:19 ` Matthew Wilcox
2020-11-01 21:43 ` Joe Perches
2020-11-01 22:06 ` Matthew Wilcox
2020-11-01 22:08 ` Joe Perches
2020-11-01 22:13 ` Joe Perches
2020-11-01 22:14 ` Joe Perches
2020-11-02 13:33 ` Greg Kroah-Hartman
2020-11-02 14:08 ` Matthew Wilcox
2020-11-02 14:32 ` Greg Kroah-Hartman
2020-11-02 14:40 ` Matthew Wilcox
2020-11-02 17:01 ` Joe Perches
2020-11-01 20:12 ` [PATCH 5/5] mm: slub: Convert sysfs sprintf family to sysfs_emit/sysfs_emit_at Joe Perches
2020-11-13 12:10 ` [mm] b6efe2fcc4: BUG:kernel_NULL_pointer_dereference,address kernel test robot
2020-11-13 16:13 ` Joe Perches
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