tree 5a930850752154a0a9e4b4458f67b04e756bf744
parent 2e4dafd5d169ea2d5b066e38b5f8f9e416dc9eaa
author Ralf Baechle <ralf@linux-mips.org> 1188829346 +0200
committer Ralf Baechle <ralf@linux-mips.org> 1189455928 +0100

[MIPS] Provide empty irq_enable_hazard definition for legacy and R1 cores.

Following a strict interpretation the empty definition of irq_enable_hazard
has always been a bug - but an intentional one because it didn't bite.
This has now changed, for uniprocessor kernels mm/slab.c:do_drain()

[...]
        on_each_cpu(do_drain, cachep, 1, 1);
        check_irq_on();
[...]

may be compiled into a mtc0 c0_status; mfc0 c0_status sequence resulting
in a back-to-back hazard.

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