Merge commit '63cc8c75156462d4b42cbdd76c293b7eee7ddbfe':

"percpu: introduce DEFINE_PER_CPU_PAGE_ALIGNED() macro"

into x86/core

Conflicts:
arch/x86/kernel/cpu/common.c

Signed-off-by: Ingo Molnar <[e-mail]>

arch/x86/kernel/cpu/common.c

···
 
 static struct cpu_dev *this_cpu __cpuinitdata;
 
-DEFINE_PER_CPU(struct gdt_page, gdt_page) = { .gdt = {
+DEFINE_PER_CPU_PAGE_ALIGNED(struct gdt_page, gdt_page) = { .gdt = {
 	[GDT_ENTRY_KERNEL_CS] = { { { 0x0000ffff, 0x00cf9a00 } } },
 	[GDT_ENTRY_KERNEL_DS] = { { { 0x0000ffff, 0x00cf9200 } } },
 	[GDT_ENTRY_DEFAULT_USER_CS] = { { { 0x0000ffff, 0x00cffa00 } } },

arch/x86/kernel/vmlinux_32.lds.S

···
   . = ALIGN(PAGE_SIZE);
   .data.percpu  : AT(ADDR(.data.percpu) - LOAD_OFFSET) {
 	__per_cpu_start = .;
+	*(.data.percpu.page_aligned)
 	*(.data.percpu)
 	*(.data.percpu.shared_aligned)
 	__per_cpu_end = .;

include/asm-generic/vmlinux.lds.h

···
 	. = ALIGN(align);						\
 	VMLINUX_SYMBOL(__per_cpu_start) = .;				\
 	.data.percpu  : AT(ADDR(.data.percpu) - LOAD_OFFSET) {		\
+		*(.data.percpu.page_aligned)				\
 		*(.data.percpu)						\
 		*(.data.percpu.shared_aligned)				\
 	}								\

include/linux/percpu.h

···
 	__attribute__((__section__(SHARED_ALIGNED_SECTION)))		\
 	PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name		\
 	____cacheline_aligned_in_smp
+
+#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name)			\
+	__attribute__((__section__(".data.percpu.page_aligned")))	\
+	PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
 #else
 #define DEFINE_PER_CPU(type, name)					\
 	PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
 
 #define DEFINE_PER_CPU_SHARED_ALIGNED(type, name)		      \
+	DEFINE_PER_CPU(type, name)
+
+#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name)		      \
 	DEFINE_PER_CPU(type, name)
 #endif