I've been getting a warning when building the kernel (2.6.27.4):
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.
After doing some googling, I found a patch:
--- arch/x86/kernel/head_32.S.orig 2008-10-14 17:04:39.000000000 -0500
+++ arch/x86/kernel/head_32.S 2008-10-14 17:03:12.000000000 -0500
@@ -600,6 +600,7 @@
.section .cpuinit.data,"wa"
.align 4
+__REFDATA
ENTRY(initial_code)
.long i386_start_kernel
Evidently only some combinations of options triggers the warning. The above
patch fixed it for me.
-- Bruce
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