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-rw-r--r--include/asm-generic/vmlinux.lds.h4
-rw-r--r--include/linux/percpu-defs.h9
2 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 8a92a170fb7d..d7e7b21511b1 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -677,7 +677,9 @@
- LOAD_OFFSET) { \
VMLINUX_SYMBOL(__per_cpu_start) = .; \
*(.data..percpu..first) \
+ . = ALIGN(PAGE_SIZE); \
*(.data..percpu..page_aligned) \
+ *(.data..percpu..readmostly) \
*(.data..percpu) \
*(.data..percpu..shared_aligned) \
VMLINUX_SYMBOL(__per_cpu_end) = .; \
@@ -703,6 +705,8 @@
VMLINUX_SYMBOL(__per_cpu_load) = .; \
VMLINUX_SYMBOL(__per_cpu_start) = .; \
*(.data..percpu..first) \
+ . = ALIGN(PAGE_SIZE); \
+ *(.data..percpu..readmostly) \
*(.data..percpu..page_aligned) \
*(.data..percpu) \
*(.data..percpu..shared_aligned) \
diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
index ce2dc655cd1d..27ef6b190ea6 100644
--- a/include/linux/percpu-defs.h
+++ b/include/linux/percpu-defs.h
@@ -139,6 +139,15 @@
__aligned(PAGE_SIZE)
/*
+ * Declaration/definition used for per-CPU variables that must be read mostly.
+ */
+#define DECLARE_PER_CPU_READ_MOSTLY(type, name) \
+ DECLARE_PER_CPU_SECTION(type, name, "..readmostly")
+
+#define DEFINE_PER_CPU_READ_MOSTLY(type, name) \
+ DEFINE_PER_CPU_SECTION(type, name, "..readmostly")
+
+/*
* Intermodule exports for per-CPU variables. sparse forgets about
* address space across EXPORT_SYMBOL(), change EXPORT_SYMBOL() to
* noop if __CHECKER__.