Commit c05f0be8 authored by Nicholas Piggin's avatar Nicholas Piggin Committed by Michael Ellerman

powerpc/64s: masked_interrupt() returns to kernel so avoid restoring r13

Places in the kernel where r13 is not the PACA pointer must have
maskable interrupts disabled, so r13 does not have to be restored when
returning from a soft-masked interrupt. We should never have
interrupts soft disabled when we're in user space.
Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 6e9a2f6e
...@@ -1379,7 +1379,7 @@ masked_##_H##interrupt: \ ...@@ -1379,7 +1379,7 @@ masked_##_H##interrupt: \
ld r9,PACA_EXGEN+EX_R9(r13); \ ld r9,PACA_EXGEN+EX_R9(r13); \
ld r10,PACA_EXGEN+EX_R10(r13); \ ld r10,PACA_EXGEN+EX_R10(r13); \
ld r11,PACA_EXGEN+EX_R11(r13); \ ld r11,PACA_EXGEN+EX_R11(r13); \
GET_SCRATCH0(r13); \ /* returns to kernel where r13 must be set up, so don't restore it */ \
##_H##rfid; \ ##_H##rfid; \
b .; \ b .; \
MASKED_DEC_HANDLER(_H) MASKED_DEC_HANDLER(_H)
......
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