From: Jesper Juhl <jj@chaosbits.net>
Date: Sat, 30 Oct 2010 13:56:54 +0000 (+0200)
Subject: percpu: zero memory more efficiently in mm/percpu.c::pcpu_mem_alloc()
X-Git-Tag: firefly_0821_release~7613^2~3101^2~25
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7af4c0932437f97938eef67e553c8d211f9edf33;p=firefly-linux-kernel-4.4.55.git

percpu: zero memory more efficiently in mm/percpu.c::pcpu_mem_alloc()

Don't do vmalloc() + memset() when vzalloc() will do.

tj: dropped unnecessary temp variable ptr.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Tejun Heo <tj@kernel.org>
---

diff --git a/mm/percpu.c b/mm/percpu.c
index efe816856a9d..9e16d1c9ebd5 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -293,12 +293,8 @@ static void *pcpu_mem_alloc(size_t size)
 
 	if (size <= PAGE_SIZE)
 		return kzalloc(size, GFP_KERNEL);
-	else {
-		void *ptr = vmalloc(size);
-		if (ptr)
-			memset(ptr, 0, size);
-		return ptr;
-	}
+	else
+		return vzalloc(size);
 }
 
 /**