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ARCv2: entry: avoid a branch

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Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2019-05-10 16:24:15 -07:00
parent 23c0cbd0c7
commit ab854bfcd3
1 changed files with 2 additions and 3 deletions
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5
arch/arc/include/asm/entry-arcv2.h
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@ -100,12 +100,11 @@
; 2. Upon entry SP is always saved (for any inspection, unwinding etc),
; but on return, restored only if U mode
lr r9, [AUX_USER_SP] ; U mode SP
mov.nz r9, sp
add.nz r9, r9, SZ_PT_REGS - PT_sp - 4 ; K mode SP
bnz 1f
lr r9, [AUX_USER_SP] ; U mode SP
1:
PUSH r9 ; SP (pt_regs->sp)
PUSH fp