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x86: fix cpu hotplug on 32bit

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commit 3e9704739d ("x86: boot secondary
cpus through initial_code") causes the kernel to crash when a CPU is
brought online after the read only sections have been write
protected. The write to initial_code in do_boot_cpu() fails.

Move inital_code to .cpuinit.data section.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Thomas Gleixner 2008-07-27 21:43:11 +02:00
parent 8be1a6d6c7
commit 583323b9d2
1 changed files with 5 additions and 3 deletions
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8
arch/x86/kernel/head_32.S
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@ -456,9 +456,6 @@ is386: movl $2,%ecx # set MP
1: 1:
#endif /* CONFIG_SMP */ #endif /* CONFIG_SMP */
jmp *(initial_code) jmp *(initial_code)
.align 4
ENTRY(initial_code)
.long i386_start_kernel
/* /*
* We depend on ET to be correct. This checks for 287/387. * We depend on ET to be correct. This checks for 287/387.
@ -601,6 +598,11 @@ ignore_int:
#endif #endif
iret iret
.section .cpuinit.data,"wa"
.align 4
ENTRY(initial_code)
.long i386_start_kernel
.section .text .section .text
/* /*
* Real beginning of normal "text" segment * Real beginning of normal "text" segment