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authorAlexey Dobriyan <adobriyan@gmail.com>2018-02-07 02:36:51 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-02-07 05:32:43 +0300
commite3912ac37e07a13c70675cd75020694de4841c74 (patch)
tree78d2e8a58b5ff64444fedfa542fbaccd3d9a86c1 /fs/proc/self.c
parent48c232395431c23d35cf3b4c5a090bd793316578 (diff)
downloadlinux-e3912ac37e07a13c70675cd75020694de4841c74.tar.xz
proc: use %u for pid printing and slightly less stack
PROC_NUMBUF is 13 which is enough for "negative int + \n + \0". However PIDs and TGIDs are never negative and newline is not a concern, so use just 10 per integer. Link: http://lkml.kernel.org/r/20171120203005.GA27743@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Alexander Viro <viro@ftp.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/self.c')
-rw-r--r--fs/proc/self.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/proc/self.c b/fs/proc/self.c
index 31326bb23b8b..d30627aa440b 100644
--- a/fs/proc/self.c
+++ b/fs/proc/self.c
@@ -17,11 +17,11 @@ static const char *proc_self_get_link(struct dentry *dentry,
if (!tgid)
return ERR_PTR(-ENOENT);
- /* 11 for max length of signed int in decimal + NULL term */
- name = kmalloc(12, dentry ? GFP_KERNEL : GFP_ATOMIC);
+ /* max length of unsigned int in decimal + NULL term */
+ name = kmalloc(10 + 1, dentry ? GFP_KERNEL : GFP_ATOMIC);
if (unlikely(!name))
return dentry ? ERR_PTR(-ENOMEM) : ERR_PTR(-ECHILD);
- sprintf(name, "%d", tgid);
+ sprintf(name, "%u", tgid);
set_delayed_call(done, kfree_link, name);
return name;
}