Commit 0bd74fa8 authored by Brian Gerst's avatar Brian Gerst Committed by Tejun Heo

percpu: refactor percpu.h

Impact: cleanup

Refactor the DEFINE_PER_CPU_* macros and add .data.percpu.first
section.
Signed-off-by: default avatarBrian Gerst <brgerst@gmail.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 8ce03197
......@@ -486,6 +486,7 @@
*/
#define PERCPU_VADDR(vaddr, phdr) \
PERCPU_PROLOG(vaddr) \
*(.data.percpu.first) \
*(.data.percpu.page_aligned) \
*(.data.percpu) \
*(.data.percpu.shared_aligned) \
......
......@@ -9,34 +9,39 @@
#include <asm/percpu.h>
#ifdef CONFIG_SMP
#define DEFINE_PER_CPU(type, name) \
__attribute__((__section__(".data.percpu"))) \
PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
#define PER_CPU_BASE_SECTION ".data.percpu"
#ifdef MODULE
#define SHARED_ALIGNED_SECTION ".data.percpu"
#define PER_CPU_SHARED_ALIGNED_SECTION ""
#else
#define SHARED_ALIGNED_SECTION ".data.percpu.shared_aligned"
#define PER_CPU_SHARED_ALIGNED_SECTION ".shared_aligned"
#endif
#define PER_CPU_FIRST_SECTION ".first"
#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
__attribute__((__section__(SHARED_ALIGNED_SECTION))) \
PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name \
____cacheline_aligned_in_smp
#else
#define PER_CPU_BASE_SECTION ".data"
#define PER_CPU_SHARED_ALIGNED_SECTION ""
#define PER_CPU_FIRST_SECTION ""
#endif
#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name) \
__attribute__((__section__(".data.percpu.page_aligned"))) \
#define DEFINE_PER_CPU_SECTION(type, name, section) \
__attribute__((__section__(PER_CPU_BASE_SECTION section))) \
PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
#else
#define DEFINE_PER_CPU(type, name) \
PER_CPU_ATTRIBUTES __typeof__(type) per_cpu__##name
DEFINE_PER_CPU_SECTION(type, name, "")
#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
DEFINE_PER_CPU(type, name)
#define DEFINE_PER_CPU_SHARED_ALIGNED(type, name) \
DEFINE_PER_CPU_SECTION(type, name, PER_CPU_SHARED_ALIGNED_SECTION) \
____cacheline_aligned_in_smp
#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name) \
DEFINE_PER_CPU(type, name)
#endif
#define DEFINE_PER_CPU_PAGE_ALIGNED(type, name) \
DEFINE_PER_CPU_SECTION(type, name, ".page_aligned")
#define DEFINE_PER_CPU_FIRST(type, name) \
DEFINE_PER_CPU_SECTION(type, name, PER_CPU_FIRST_SECTION)
#define EXPORT_PER_CPU_SYMBOL(var) EXPORT_SYMBOL(per_cpu__##var)
#define EXPORT_PER_CPU_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(per_cpu__##var)
......
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