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Subject[PATCH] x86: Provide _sdata in the vmlinux_*.lds.S files
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_sdata is a common symbol defined by many architectures and made
available to the kernel via asm-generic/sections.h. Kmemleak uses this
symbol when scanning the data sections. The _edata symbol in
vmlinux_64.lds.S was also moved further down to include the
.data.read_mostly section.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ingo Molnar <mingo@elte.hu>
---
arch/x86/kernel/vmlinux_32.lds.S | 1 +
arch/x86/kernel/vmlinux_64.lds.S | 3 ++-
2 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/vmlinux_32.lds.S b/arch/x86/kernel/vmlinux_32.lds.S
index 62ad500..181bd49 100644
--- a/arch/x86/kernel/vmlinux_32.lds.S
+++ b/arch/x86/kernel/vmlinux_32.lds.S
@@ -64,6 +64,7 @@ SECTIONS
/* writeable */
. = ALIGN(PAGE_SIZE);
.data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */
+ _sdata = .; /* Start of data section */
DATA_DATA
CONSTRUCTORS
} :data
diff --git a/arch/x86/kernel/vmlinux_64.lds.S b/arch/x86/kernel/vmlinux_64.lds.S
index c874250..4398a91 100644
--- a/arch/x86/kernel/vmlinux_64.lds.S
+++ b/arch/x86/kernel/vmlinux_64.lds.S
@@ -59,9 +59,9 @@ SECTIONS
. = ALIGN(PAGE_SIZE); /* Align data segment to page size boundary */
/* Data */
.data : AT(ADDR(.data) - LOAD_OFFSET) {
+ _sdata = .; /* Start of data section */
DATA_DATA
CONSTRUCTORS
- _edata = .; /* End of data section */
} :data


@@ -73,6 +73,7 @@ SECTIONS
. = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
.data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
*(.data.read_mostly)
+ _edata = .; /* End of data section */
}

#define VSYSCALL_ADDR (-10*1024*1024)


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