linux-kernel - [PATCH 2/2] SLUB: Use GFP_PANIC for early-boot allocations

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Message-Id: <1241795429.28600.61.camel@penberg-laptop>
Date:	Fri, 08 May 2009 18:10:29 +0300
From:	Pekka Enberg <penberg@...helsinki.fi>
To:	akpm@...ux-foundation.org
Cc:	gorcunov@...nvz.org, kosaki.motohiro@...fujitsu.com, mel@....ul.ie,
	cl@...ux-foundation.org, riel@...hat.com,
	linux-kernel@...r.kernel.org, mingo@...e.hu, rientjes@...gle.com
Subject: [PATCH 2/2] SLUB: Use GFP_PANIC for early-boot allocations

From: Pekka Enberg <penberg@...helsinki.fi>

This patch converts SLUB early-boot code to use GFP_PANIC instead of explicit
BUG_ON() calls.

Signed-off-by: Pekka Enberg <penberg@...helsinki.fi>
---
 mm/slub.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index 7ab54ec..55216b4 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2109,9 +2109,8 @@ static void early_kmem_cache_node_alloc(gfp_t gfpflags, int node)
 
 	BUG_ON(kmalloc_caches->size < sizeof(struct kmem_cache_node));
 
-	page = new_slab(kmalloc_caches, gfpflags, node);
+	page = new_slab(kmalloc_caches, gfpflags | GFP_PANIC, node);
 
-	BUG_ON(!page);
 	if (page_to_nid(page) != node) {
 		printk(KERN_ERR "SLUB: Unable to allocate memory from "
 				"node %d\n", node);
@@ -4367,10 +4366,9 @@ static struct kset *slab_kset;
  */
 static char *create_unique_id(struct kmem_cache *s)
 {
-	char *name = kmalloc(ID_STR_LENGTH, GFP_KERNEL);
-	char *p = name;
+	char *name, *p;
 
-	BUG_ON(!name);
+	p = name = kmalloc(ID_STR_LENGTH, GFP_KERNEL | GFP_PANIC);
 
 	*p++ = ':';
 	/*
-- 
1.5.6.3



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