提交 d3d0ba7b 编写于 作者: I Ingo Molnar

Merge commit '63cc8c75':

  "percpu: introduce DEFINE_PER_CPU_PAGE_ALIGNED() macro"

into x86/core

Conflicts:
	arch/x86/kernel/cpu/common.c
Signed-off-by: NIngo Molnar <mingo@elte.hu>
......@@ -24,7 +24,7 @@
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 } } },
......
......@@ -180,6 +180,7 @@ SECTIONS
. = 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 = .;
......
......@@ -385,6 +385,7 @@
. = 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) \
} \
......
......@@ -23,12 +23,19 @@
__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
#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
......
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