proc: use "unsigned int" in /proc/stat hook

Number of CPUs is never high enough to force 64-bit arithmetic.
Save couple of bytes on x86_64.

Link: http://lkml.kernel.org/r/20180627200710.GC18434@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index 59749df..535eda7 100644 (file)
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -183,7 +183,7 @@ static int show_stat(struct seq_file *p, void *v)
 
 static int stat_open(struct inode *inode, struct file *file)
 {
-       size_t size = 1024 + 128 * num_online_cpus();
+       unsigned int size = 1024 + 128 * num_online_cpus();
 
        /* minimum size to display an interrupt count : 2 bytes */
        size += 2 * nr_irqs;