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authorAlexey Dobriyan <adobriyan@gmail.com>2011-03-23 16:42:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-23 19:46:37 -0700
commit312ec7e50c4d3f40b3762af651d1aa79a67f556a (patch)
tree98112d9c80aacd011e313268b5f5d8caf5b5b727
parentfc3d8767b2b6de955579852d7a150f1734265eaf (diff)
downloadop-kernel-dev-312ec7e50c4d3f40b3762af651d1aa79a67f556a.zip
op-kernel-dev-312ec7e50c4d3f40b3762af651d1aa79a67f556a.tar.gz
proc: make struct proc_dir_entry::namelen unsigned int
1. namelen is declared "unsigned short" which hints for "maybe space savings". Indeed in 2.4 struct proc_dir_entry looked like: struct proc_dir_entry { unsigned short low_ino; unsigned short namelen; Now, low_ino is "unsigned int", all savings were gone for a long time. "struct proc_dir_entry" is not that countless to worry about it's size, anyway. 2. converting from unsigned short to int/unsigned int can only create problems, we better play it safe. Space is not really conserved, because of natural alignment for the next field. sizeof(struct proc_dir_entry) remains the same. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/proc/generic.c8
-rw-r--r--include/linux/proc_fs.h2
2 files changed, 5 insertions, 5 deletions
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 01e07f2..f1281339 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -28,7 +28,7 @@
DEFINE_SPINLOCK(proc_subdir_lock);
-static int proc_match(int len, const char *name, struct proc_dir_entry *de)
+static int proc_match(unsigned int len, const char *name, struct proc_dir_entry *de)
{
if (de->namelen != len)
return 0;
@@ -303,7 +303,7 @@ static int __xlate_proc_name(const char *name, struct proc_dir_entry **ret,
{
const char *cp = name, *next;
struct proc_dir_entry *de;
- int len;
+ unsigned int len;
de = *ret;
if (!de)
@@ -602,7 +602,7 @@ static struct proc_dir_entry *__proc_create(struct proc_dir_entry **parent,
{
struct proc_dir_entry *ent = NULL;
const char *fn = name;
- int len;
+ unsigned int len;
/* make sure name is valid */
if (!name || !strlen(name)) goto out;
@@ -786,7 +786,7 @@ void remove_proc_entry(const char *name, struct proc_dir_entry *parent)
struct proc_dir_entry **p;
struct proc_dir_entry *de = NULL;
const char *fn = name;
- int len;
+ unsigned int len;
spin_lock(&proc_subdir_lock);
if (__xlate_proc_name(name, &parent, &fn) != 0) {
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 379eaed..838c114 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -50,7 +50,7 @@ typedef int (write_proc_t)(struct file *file, const char __user *buffer,
struct proc_dir_entry {
unsigned int low_ino;
- unsigned short namelen;
+ unsigned int namelen;
const char *name;
mode_t mode;
nlink_t nlink;
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