linux-kernel - [103/205] kmemleak: Add support for NO

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Message-Id: <20100730175143.125651296@clark.site>
Date:	Fri, 30 Jul 2010 10:52:00 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Catalin Marinas <catalin.marinas@....com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Yinghai Lu <yinghai@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: [103/205] kmemleak: Add support for NO_BOOTMEM configurations

2.6.34-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Catalin Marinas <catalin.marinas@....com>

commit 9078370c0d2cfe4a905aa34f398bbb0d65921a2b upstream.

With commits 08677214 and 59be5a8e, alloc_bootmem()/free_bootmem() and
friends use the early_res functions for memory management when
NO_BOOTMEM is enabled. This patch adds the kmemleak calls in the
corresponding code paths for bootmem allocations.

Signed-off-by: Catalin Marinas <catalin.marinas@....com>
Acked-by: Pekka Enberg <penberg@...helsinki.fi>
Acked-by: Yinghai Lu <yinghai@...nel.org>
Cc: H. Peter Anvin <hpa@...or.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 kernel/early_res.c |    6 ++++++
 mm/page_alloc.c    |    5 +++++
 2 files changed, 11 insertions(+)

--- a/kernel/early_res.c
+++ b/kernel/early_res.c
@@ -7,6 +7,8 @@
 #include <linux/bootmem.h>
 #include <linux/mm.h>
 #include <linux/early_res.h>
+#include <linux/slab.h>
+#include <linux/kmemleak.h>
 
 /*
  * Early reserved memory areas.
@@ -319,6 +321,8 @@ void __init free_early(u64 start, u64 en
 	struct early_res *r;
 	int i;
 
+	kmemleak_free_part(__va(start), end - start);
+
 	i = find_overlapped_early(start, end);
 	r = &early_res[i];
 	if (i >= max_early_res || r->end != end || r->start != start)
@@ -333,6 +337,8 @@ void __init free_early_partial(u64 start
 	struct early_res *r;
 	int i;
 
+	kmemleak_free_part(__va(start), end - start);
+
 	if (start == end)
 		return;
 
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3440,6 +3440,11 @@ void * __init __alloc_memory_core_early(
 		ptr = phys_to_virt(addr);
 		memset(ptr, 0, size);
 		reserve_early_without_check(addr, addr + size, "BOOTMEM");
+		/*
+		 * The min_count is set to 0 so that bootmem allocated blocks
+		 * are never reported as leaks.
+		 */
+		kmemleak_alloc(ptr, size, 0, 0);
 		return ptr;
 	}
 


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