MIPS: Avoid overoptimization by GCC.

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Without this, it's possible that LTO will discard the calls to
set_except_vector() in the probe for the DADDI overflow bug resulting in a
kernel crash like this:

 [...]
 Mount-cache hash table entries: 256
 Checking for the daddi bug... Integer overflow[#1]:
 Cpu 0
 $ 0   : 0000000000000000 0000000010008ce1 0000000000000001 0000000000000000
 $ 4   : 7fffffffffffedcd ffffffff81410000 0000000000000030 000000000000003f
 [...]

There are other similar places in the kernel so we've just been lucky
that GCC's been tolerant.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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Ralf Baechle 2013-03-14 18:49:26 +01:00

parent 02b849f761

commit 1186e4e904

1 changed files with 1 additions and 2 deletions

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arch/mips/kernel/traps.c

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