arch: define weak abort()
commitpull/10/head7c2c11b208
upstream. gcc toggle -fisolate-erroneous-paths-dereference (default at -O2 onwards) isolates faulty code paths such as null pointer access, divide by zero etc. If gcc port doesnt implement __builtin_trap, an abort() is generated which causes kernel link error. In this case, gcc is generating abort due to 'divide by zero' in lib/mpi/mpih-div.c. Currently 'frv' and 'arc' are failing. Previously other arch was also broken like m32r was fixed by commitd22e3d69ee
("m32r: fix build failure"). Let's define this weak function which is common for all arch and fix the problem permanently. We can even remove the arch specific 'abort' after this is done. Link: http://lkml.kernel.org/r/1513118956-8718-1-git-send-email-sudipm.mukherjee@gmail.com Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com> Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com> Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Evgeniy Didin <Evgeniy.Didin@synopsys.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1755,3 +1755,11 @@ Efault:
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return -EFAULT;
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}
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#endif
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__weak void abort(void)
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{
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BUG();
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/* if that doesn't kill us, halt */
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panic("Oops failed to kill thread");
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}
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