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authorSam Ravnborg <sam@ravnborg.org>2009-04-29 09:47:28 +0200
committerIngo Molnar <mingo@elte.hu>2009-04-29 10:20:34 +0200
commit9d16e78318f174fd4b07916a93e41749d5199267 (patch)
treeca6c0cdbd651aeef4df3b0d6c2b9c05c0e8cbebd /arch/x86/kernel/vmlinux.lds.S
parentbf6a57418d5445c98047edbec022c9e54d1526e6 (diff)
x86, vmlinux.lds: unify percpu
32 bit: - move __init_end outside the .bss output section It really did not belong in there [ Impact: 64-bit: cleanup, 32-bit: refactor linker script ] Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Tim Abbott <tabbott@MIT.EDU> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1240991249-27117-12-git-send-email-sam@ravnborg.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/vmlinux.lds.S')
-rw-r--r--arch/x86/kernel/vmlinux.lds.S30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 1ab62a5fa1a5..1ea2b8571e1a 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -330,6 +330,36 @@ SECTIONS
}
#endif
+#if defined(CONFIG_X86_64) && defined(CONFIG_SMP)
+ /*
+ * percpu offsets are zero-based on SMP. PERCPU_VADDR() changes the
+ * output PHDR, so the next output section - __data_nosave - should
+ * start another section data.init2. Also, pda should be at the head of
+ * percpu area. Preallocate it and define the percpu offset symbol
+ * so that it can be accessed as a percpu variable.
+ */
+ . = ALIGN(PAGE_SIZE);
+ PERCPU_VADDR(0, :percpu)
+#else
+ PERCPU(PAGE_SIZE)
+#endif
+
+ . = ALIGN(PAGE_SIZE);
+ /* freed after init ends here */
+ __init_end = .;
+
+#ifdef CONFIG_X86_64
+ .data_nosave : AT(ADDR(.data_nosave) - LOAD_OFFSET) {
+ . = ALIGN(PAGE_SIZE);
+ __nosave_begin = .;
+ *(.data.nosave)
+ . = ALIGN(PAGE_SIZE);
+ __nosave_end = .;
+ } :data.init2
+ /* use another section data.init2, see PERCPU_VADDR() above */
+#endif
+
+
#ifdef CONFIG_X86_32
# include "vmlinux_32.lds.S"
#else