linux-kernel - [PATCH 2.6.20-rc1 05/10] Add kmemleak support for i386

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Date:	Sat, 16 Dec 2006 15:35:09 +0000
From:	Catalin Marinas <catalin.marinas@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH 2.6.20-rc1 05/10] Add kmemleak support for i386

This patch adds the kmemleak-related entries to the vmlinux.lds.S
linker script.

Signed-off-by: Catalin Marinas <catalin.marinas@...il.com>
---

 arch/i386/kernel/vmlinux.lds.S |    6 ++++++
 include/asm-i386/thread_info.h |   18 ++++++++++++++++--
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/arch/i386/kernel/vmlinux.lds.S b/arch/i386/kernel/vmlinux.lds.S
index a53c8b1..2850bed 100644
--- a/arch/i386/kernel/vmlinux.lds.S
+++ b/arch/i386/kernel/vmlinux.lds.S
@@ -69,6 +69,7 @@ SECTIONS
 
   /* writeable */
   . = ALIGN(4096);
+  _sdata = .;			/* Start of data section */
   .data : AT(ADDR(.data) - LOAD_OFFSET) {	/* Data */
 	*(.data)
 	CONSTRUCTORS
@@ -193,6 +194,11 @@ SECTIONS
 	*(.data.percpu)
 	__per_cpu_end = .;
   }
+  .init.memleak_offsets : AT(ADDR(.init.memleak_offsets) - LOAD_OFFSET) {
+	__memleak_offsets_start = .;
+	*(.init.memleak_offsets)
+	__memleak_offsets_end = .;
+  }
   . = ALIGN(4096);
   /* freed after init ends here */
 	
diff --git a/include/asm-i386/thread_info.h b/include/asm-i386/thread_info.h
index 4b187bb..02f3457 100644
--- a/include/asm-i386/thread_info.h
+++ b/include/asm-i386/thread_info.h
@@ -95,9 +95,23 @@ static inline struct thread_info *curren
 
 /* thread information allocation */
 #ifdef CONFIG_DEBUG_STACK_USAGE
-#define alloc_thread_info(tsk) kzalloc(THREAD_SIZE, GFP_KERNEL)
+#define alloc_thread_info(tsk)					\
+	({							\
+		struct thread_info *ret;			\
+								\
+		ret = kzalloc(THREAD_SIZE, GFP_KERNEL);		\
+		memleak_ignore(ret);				\
+		ret;						\
+	})
 #else
-#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
+#define alloc_thread_info(tsk)					\
+	({							\
+		struct thread_info *ret;			\
+								\
+		ret = kmalloc(THREAD_SIZE, GFP_KERNEL);		\
+		memleak_ignore(ret);				\
+		ret;						\
+	})
 #endif
 
 #define free_thread_info(info)	kfree(info)
-
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