Merge branch 'core/percpu' into percpu-cpumask-x86-for-linus-2

[linux-2.6-omap-h63xx.git] / include / asm-generic / vmlinux.lds.h

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index aca40b93bd28f604f12d9f04d8443277a6f3dba0..a654d724d3b05b7d1e6a280d994f2a3f4df58dd1 100644 (file)
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -427,12 +427,59 @@
        *(.initcall7.init)                                              \
        *(.initcall7s.init)
 
+/**
+ * PERCPU_VADDR - define output section for percpu area
+ * @vaddr: explicit base address (optional)
+ * @phdr: destination PHDR (optional)
+ *
+ * Macro which expands to output section for percpu area.  If @vaddr
+ * is not blank, it specifies explicit base address and all percpu
+ * symbols will be offset from the given address.  If blank, @vaddr
+ * always equals @laddr + LOAD_OFFSET.
+ *
+ * @phdr defines the output PHDR to use if not blank.  Be warned that
+ * output PHDR is sticky.  If @phdr is specified, the next output
+ * section in the linker script will go there too.  @phdr should have
+ * a leading colon.
+ *
+ * Note that this macros defines __per_cpu_load as an absolute symbol.
+ * If there is no need to put the percpu section at a predetermined
+ * address, use PERCPU().
+ */
+#define PERCPU_VADDR(vaddr, phdr)                                      \
+       VMLINUX_SYMBOL(__per_cpu_load) = .;                             \
+       .data.percpu vaddr : AT(VMLINUX_SYMBOL(__per_cpu_load)          \
+                               - LOAD_OFFSET) {                        \
+               VMLINUX_SYMBOL(__per_cpu_start) = .;                    \
+               *(.data.percpu.first)                                   \
+               *(.data.percpu.page_aligned)                            \
+               *(.data.percpu)                                         \
+               *(.data.percpu.shared_aligned)                          \
+               VMLINUX_SYMBOL(__per_cpu_end) = .;                      \
+       } phdr                                                          \
+       . = VMLINUX_SYMBOL(__per_cpu_load) + SIZEOF(.data.percpu);
+
+/**
+ * PERCPU - define output section for percpu area, simple version
+ * @align: required alignment
+ *
+ * Align to @align and outputs output section for percpu area.  This
+ * macro doesn't maniuplate @vaddr or @phdr and __per_cpu_load and
+ * __per_cpu_start will be identical.
+ *
+ * This macro is equivalent to ALIGN(align); PERCPU_VADDR( , ) except
+ * that __per_cpu_load is defined as a relative symbol against
+ * .data.percpu which is required for relocatable x86_32
+ * configuration.
+ */
 #define PERCPU(align)                                                  \
        . = ALIGN(align);                                               \
-       VMLINUX_SYMBOL(__per_cpu_start) = .;                            \
-       .data.percpu  : AT(ADDR(.data.percpu) - LOAD_OFFSET) {          \
+       .data.percpu    : AT(ADDR(.data.percpu) - LOAD_OFFSET) {        \
+               VMLINUX_SYMBOL(__per_cpu_load) = .;                     \
+               VMLINUX_SYMBOL(__per_cpu_start) = .;                    \
+               *(.data.percpu.first)                                   \
                *(.data.percpu.page_aligned)                            \
                *(.data.percpu)                                         \
                *(.data.percpu.shared_aligned)                          \
-       }                                                               \
-       VMLINUX_SYMBOL(__per_cpu_end) = .;
+               VMLINUX_SYMBOL(__per_cpu_end) = .;                      \
+       }