diff options
author | Joshua Kinard <kumba@gentoo.org> | 2017-01-28 22:24:16 -0500 |
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committer | James Hogan <james.hogan@imgtec.com> | 2017-02-14 09:00:23 +0000 |
commit | 573deec09436c9136fff6d78e0325e052a1ad6be (patch) | |
tree | f85723490be8ef015f86c7a7e374ec99aae35dba /arch/mips/cavium-octeon | |
parent | 93e502b3c2d44dcb964141cbf82930282de8e40b (diff) |
MIPS: Disable stack checks on MIPS kernels
Disable stack checking on MIPS kernels. Some distribution toolchains
might pass the -fstack-check option to gcc. This results in a
store-doubleword instruction being emitted at the top of all
functions that checks the available stack space. E.g.,
a80000000001d740 <per_cpu_init>:
a80000000001d740: ffa0bfc0 sd zero,-16448(sp)
a80000000001d744: 2405ffc9 li a1,-55
a80000000001d748: 67bdffc0 daddiu sp,sp,-64
Generally, this is undesirable, and especially on the SGI IP27
platform, it will trigger a NULL pointer dereference in
'_raw_spin_lock_irq' during early init.
Signed-off-by: Joshua Kinard <kumba@gentoo.org>
Suggested-by: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/15132/
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Diffstat (limited to 'arch/mips/cavium-octeon')
0 files changed, 0 insertions, 0 deletions