x86: Include all of .data.* sections in _edata on 64-bit

The .data.read_mostly and .data.cacheline_aligned sections
aren't covered by the _sdata .. _edata range on x86-64. This
affects kmemleak reporting leading to possible false
positives by not scanning the whole data section.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Tested-by: Alexey Fisher <bug-track@fisher-privat.net>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
LKML-Reference: <1247565175.28240.37.camel@pc1117.cambridge.arm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Sam Ravnborg <sam@ravnborg.org>

arch/x86/kernel/vmlinux.lds.S

@@ -112,11 +112,6 @@ SECTIONS
 		_sdata = .;
 		DATA_DATA
 		CONSTRUCTORS
-
-#ifdef CONFIG_X86_64
-		/* End of data section */
-		_edata = .;
-#endif
 	} :data
 
 #ifdef CONFIG_X86_32
@@ -156,10 +151,8 @@ SECTIONS
 	.data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
 		*(.data.read_mostly)
 
-#ifdef CONFIG_X86_32
 		/* End of data section */
 		_edata = .;
-#endif
 	}
 
 #ifdef CONFIG_X86_64