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>

diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index 1ab62a5..1ea2b85 100644 (file)
--- 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

diff --cc arch/x86/kernel/vmlinux_32.lds.S
Simple merge

diff --cc arch/x86/kernel/vmlinux_64.lds.S
Simple merge