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authorChristian Borntraeger <cborntra@de.ibm.com>2006-10-11 15:31:52 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-10-11 15:31:52 +0200
commit75e9de18f079a51fa987ef0703112d5bc125fdb7 (patch)
treee9bdf9972851d7de6a8b5392bd4666f6fa96046d /kernel/extable.c
parent12975aef62836e9f3e179afaaded8045f8a25ac4 (diff)
downloadblackbird-op-linux-75e9de18f079a51fa987ef0703112d5bc125fdb7.tar.gz
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[S390] stacktrace bug.
The latest kernel 2.6.19-rc1 triggers a bug in the s390 specific stack trace code when compiled with gcc 3.4. This patch fixes the latest lock dependency validator code (2.6.19-rc1) on s390 gcc 3.4. The variable sp was fixed to r15 (which is the stack pointer in the s390 abi) and assigned new values to r15. Therefore, gcc 3.4 assigns a new value to r15 and does not restore it on exit (r15 is supposed to be call save) - the kernel stack is broken. Avoid trouble by not assigning any new value to sp (r15). Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'kernel/extable.c')
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