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author | Don Zickus <dzickus@redhat.com> | 2012-06-06 14:05:42 (GMT) |
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committer | Ingo Molnar <mingo@kernel.org> | 2012-06-08 10:19:27 (GMT) |
commit | eeaaa96a3a2134a174100afd129bb0891d05f4b2 (patch) | |
tree | bdb04df0af81d196f28446c0d985aef6cf0dca97 /README | |
parent | d5d2d2eea84b0d8450b082edbc3dbde41fb8bfd8 (diff) | |
download | linux-fsl-qoriq-eeaaa96a3a2134a174100afd129bb0891d05f4b2.tar.xz |
x86/nmi: Fix section mismatch warnings on 32-bit
It was reported that compiling for 32-bit caused a bunch of
section mismatch warnings:
VDSOSYM arch/x86/vdso/vdso32-syms.lds
LD arch/x86/vdso/built-in.o
LD arch/x86/built-in.o
WARNING: arch/x86/built-in.o(.data+0x5af0): Section mismatch in
reference from the variable test_nmi_ipi_callback_na.10451 to
the function .init.text:test_nmi_ipi_callback() [...]
WARNING: arch/x86/built-in.o(.data+0x5b04): Section mismatch in
reference from the variable nmi_unk_cb_na.10399 to the function
.init.text:nmi_unk_cb() The variable nmi_unk_cb_na.10399
references the function __init nmi_unk_cb() [...]
Both of these are attributed to the internal representation of
the nmiaction struct created during register_nmi_handler. The
reason for this is that those structs are not defined in the
init section whereas the rest of the code in nmi_selftest.c is.
To resolve this, I created a new #define,
register_nmi_handler_initonly, that tags the struct as
__initdata to resolve the mismatch. This #define should only be
used in rare situations where the register/unregister is called
during init of the kernel.
Big thanks to Jan Beulich for decoding this for me as I didn't
have a clue what was going on.
Reported-by: Witold Baryluk <baryluk@smp.if.uj.edu.pl>
Tested-by: Witold Baryluk <baryluk@smp.if.uj.edu.pl>
Cc: Jan Beulich <JBeulich@suse.com>
Signed-off-by: Don Zickus <dzickus@redhat.com>
Link: http://lkml.kernel.org/r/1338991542-23000-1-git-send-email-dzickus@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'README')
0 files changed, 0 insertions, 0 deletions