powerpc: Hard wire PT_SOFTE value to 1 in ptrace & signals

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We have always had softe in pt_regs, and accessible via PT_SOFTE, even
though it is not userspace state.

The value userspace sees should always be 1, because we should never
be in userspace with interrupts soft disabled.

In a subsequent patch we will be changing the semantics of the kernel
softe value, so hard wire the value to 1 to retain the existing
semantics. As far as we know nothing ever looks at it, but better safe
than sorry.

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
[mpe: Split out of larger patch, write change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Madhavan Srinivasan 2017-08-20 23:28:24 +05:30 • committed by Michael Ellerman

parent 7a074fc083

commit a8a4b03ab9

3 changed files with 23 additions and 0 deletions

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12

arch/powerpc/kernel/ptrace.c

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8

arch/powerpc/kernel/signal_32.c

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3

arch/powerpc/kernel/signal_64.c

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