linux-kernel - Re: [patch] mm/slub: Move slab initialization into irq enabled region

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Date:	Fri, 10 Jul 2015 09:19:11 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Thomas Gleixner <tglx@...utronix.de>
cc:	LKML <linux-kernel@...r.kernel.org>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [patch] mm/slub: Move slab initialization into irq enabled
 region

There is a duplicate check for page == NULL now.


Subject: slub: allocate_slab: no need to check twice for page == NULL

Remove the second check.

Signed-off-by: Christoph Lameter <cl@...ux.com>

Index: linux/mm/slub.c
===================================================================
--- linux.orig/mm/slub.c
+++ linux/mm/slub.c
@@ -1396,9 +1396,6 @@ static struct page *allocate_slab(struct
 			kmemcheck_mark_unallocated_pages(page, pages);
 	}

-	if (!page)
-		goto out;
-
 	page->objects = oo_objects(oo);

 	order = compound_order(page);
--
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