Messages in this thread Patch in this message | | | From | Max Filippov <> | Subject | [PATCH v2 09/10] xtensa: get rid of stack frame in coprocessor_flush | Date | Thu, 21 Apr 2022 03:10:32 -0700 |
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coprocessor_flush is an ordinary function, it can use all registers. Don't reserve stack frame for it and use a7 to preserve a0 around the context saving call.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> --- Changes v1->v2:
- new patch
arch/xtensa/kernel/coprocessor.S | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S index af11ddaa8c5f..95412409c49e 100644 --- a/arch/xtensa/kernel/coprocessor.S +++ b/arch/xtensa/kernel/coprocessor.S @@ -216,10 +216,8 @@ ENDPROC(fast_coprocessor) ENTRY(coprocessor_flush) - /* reserve 4 bytes on stack to save a0 */ - abi_entry(4) + abi_entry_default - s32i a0, a1, 0 movi a4, .Lcp_regs_jump_table addx8 a4, a3, a4 addx4 a3, a3, a4 @@ -227,10 +225,11 @@ ENTRY(coprocessor_flush) beqz a4, 1f l32i a3, a3, CP_REGS_TAB_OFFSET add a2, a2, a3 + mov a7, a0 callx0 a4 -1: l32i a0, a1, 0 - - abi_ret(4) + mov a0, a7 +1: + abi_ret_default ENDPROC(coprocessor_flush) -- 2.30.2
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