Commit f29cab29 authored by Max Filippov's avatar Max Filippov
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xtensa: get rid of stack frame in coprocessor_flush 



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: default avatarMax Filippov <jcmvbkbc@gmail.com>
parent e45d4bfb

arch/xtensa/kernel/coprocessor.S

+5 −6
Original line number Diff line number Diff line
@@ -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)