Alpha Linux kernel fails with inconsistent kallsyms data
The build of the Alpha Linux kernel currently fails[1] with inconsistent kallsyms data. As I never saw that before, I thought about hardware problems. But in fact it is a bug in the Linux kernel. The end of the rodata section is marked with the "__end_rodata" symbol. This symbol have different aligning constraints than the inittext parts and therefor the start marked "_sinittext". Because of that the __end_rodata symbol shifts between < _sinittext and == _sinittext. The later variant is seen as a code symbol and recorded in the kallsyms data. On fix would be to move the exception table a little bit and get some space between that two areas. [1]: http://buildd.debian.org/fetch.cgi?pkg=linux-2.6&arch=alpha&ver=2.6.25-5&stamp=1213919009&file=log&as=raw Cc: maximilian attems <max@stro.at> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -25,6 +25,13 @@ SECTIONS
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} :kernel
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_etext = .; /* End of text section */
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NOTES :kernel :note
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.dummy : {
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*(.dummy)
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} :kernel
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RODATA
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/* Exception table */
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. = ALIGN(16);
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__ex_table : {
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@ -33,13 +40,6 @@ SECTIONS
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__stop___ex_table = .;
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}
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NOTES :kernel :note
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.dummy : {
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*(.dummy)
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} :kernel
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RODATA
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/* Will be freed after init */
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. = ALIGN(PAGE_SIZE);
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/* Init code and data */
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