diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-03-12 12:50:35 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-03-29 13:22:08 +1100 |
| commit | db297c3b07af7856fb7c666fbc9792d8e37556be (patch) | |
| tree | c42bb0c60aa768446c63d035f518c12e2910f686 | |
| parent | b96bae3ae2cb6337c0a1ad160f4cbb0666e5e38b (diff) | |
powerpc/32: Don't save thread.regs on interrupt entry
Since commit 06d67d54741a ("powerpc: make process.c suitable for both
32-bit and 64-bit"), thread.regs is set on task creation, no need to
set it again and again at each interrupt entry as it never change.
Suggested-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20d52c627303d63e461797df13e6890fc04017d0.1615552867.git.christophe.leroy@csgroup.eu
| -rw-r--r-- | arch/powerpc/kernel/entry_32.S | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 79311d0bd09b..1e201fc4a590 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -97,10 +97,8 @@ transfer_to_handler: stw r2,_XER(r11) mfspr r12,SPRN_SPRG_THREAD tovirt(r12, r12) - beq 2f /* if from user, fix up THREAD.regs */ + beq 2f addi r2, r12, -THREAD - addi r11,r1,STACK_FRAME_OVERHEAD - stw r11,PT_REGS(r12) #ifdef CONFIG_PPC_BOOK3S_32 kuep_lock r11, r12 #endif @@ -147,7 +145,6 @@ transfer_to_syscall: /* Calling convention has r9 = orig r0, r10 = regs */ addi r10,r1,STACK_FRAME_OVERHEAD mr r9,r0 - stw r10,THREAD+PT_REGS(r2) bl system_call_exception ret_from_syscall: |