MIPS: Simplify ptrace_getfpregs FPU IR retrieval

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All architecturally defined bits in the FPU implementation register
are read only & unchanging. It contains some implementation-defined
bits but the architecture manual states "This bits are explicitly not
intended to be used for mode control functions" which seems to provide
justification for viewing the register as a whole as unchanging. This
being the case we can simply re-use the value we read at boot rather
than having to re-read it later, and avoid the complexity which that
read entails.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6147/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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Paul Burton 2013-11-19 17:30:36 +00:00 • committed by Ralf Baechle

parent 3351047f01

commit dab75dd956

1 changed files with 1 additions and 24 deletions

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arch/mips/kernel/ptrace.c

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