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(parent: 6f76a01) | patch
powerpc/32: Remove verification of MSR_PR on syscall in the ASM entry
authorChristophe Leroy <christophe.leroy@csgroup.eu>
Mon, 8 Feb 2021 15:10:34 +0000 (15:10 +0000)
committerMichael Ellerman <mpe@ellerman.id.au>
Thu, 11 Feb 2021 12:35:11 +0000 (23:35 +1100)
commit4d67facbcbdb3d9e3c9cb82e4ec47fc63d298dd8
treebc4fcd1888bd1bd6089c5d72bd3200f800cb2340tree | snapshot
parent6f76a01173ccaa363739f913394d4e138d92d718commit | diff
powerpc/32: Remove verification of MSR_PR on syscall in the ASM entry

system_call_exception() checks MSR_PR and BUGs if a syscall
is issued from kernel mode.

No need to handle it anymore from the ASM entry code.

null_syscall reduction 2 cycles (348 => 346 cycles)

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1eddb42cb12092b1e3d72608d182c365db3da41d.1612796617.git.christophe.leroy@csgroup.eu
arch/powerpc/kernel/entry_32.S diff | blob | history
arch/powerpc/kernel/head_32.h diff | blob | history
arch/powerpc/kernel/head_booke.h diff | blob | history
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