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x86: fix section mismatch for i386 init code

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Startup code for i386 in arch/x86/kernel/head_32.S is using the
reference variable initial_code that is located in the .cpuinit.data
section. If CONFIG_HOTPLUG_CPU is enabled, startup code is not in an
init section and can be called later too. In this case the reference
initial_code must be kept too. This patch fixes this. See below for
the section mismatch warning.

 WARNING: vmlinux.o(.cpuinit.data+0x0): Section mismatch in reference
 from the variable initial_code to the function
 .init.text:i386_start_kernel()
 The variable __cpuinitdata initial_code references
 a function __init i386_start_kernel().
 If i386_start_kernel is only used by initial_code then
 annotate i386_start_kernel with a matching annotation.

Signed-off-by: Robert Richter <robert.richter@amd.com>
LKML-Reference: <1248716632-26844-1-git-send-email-robert.richter@amd.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Robert Richter 2009-07-27 19:43:52 +02:00 committed by H. Peter Anvin
parent e00b95debb
commit 0e83815be7
1 changed files with 5 additions and 1 deletions
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6
arch/x86/kernel/head_32.S
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@ -602,7 +602,11 @@ ignore_int:
#endif
iret
.section .cpuinit.data,"wa"
#ifndef CONFIG_HOTPLUG_CPU
__CPUINITDATA
#else
__REFDATA
#endif
.align 4
ENTRY(initial_code)
.long i386_start_kernel