[ARM] 4688/1: at91: speed-up irq processing

Save N instructions on every interrupt processing (where N is the
number of interrupts processed in any one IRQ exception).

Signed-off-by: Marc Pignat <marc.pignat@hevs.ch>
Acked-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/include/asm-arm/arch-at91/entry-macro.S b/include/asm-arm/arch-at91/entry-macro.S
index cc1d850a0788012574c2c44310245789a8b1fbb5..1005eee6219b410da4f384b5879c40e011abb50e 100644 (file)
--- a/include/asm-arm/arch-at91/entry-macro.S
+++ b/include/asm-arm/arch-at91/entry-macro.S
@@ -17,13 +17,13 @@
        .endm
 
        .macro  get_irqnr_preamble, base, tmp
+       ldr     \base, =(AT91_VA_BASE_SYS + AT91_AIC)           @ base virtual address of AIC peripheral
        .endm
 
        .macro  arch_ret_to_user, tmp1, tmp2
        .endm
 
        .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
-       ldr     \base, =(AT91_VA_BASE_SYS + AT91_AIC)           @ base virtual address of AIC peripheral
        ldr     \irqnr, [\base, #(AT91_AIC_IVR - AT91_AIC)]     @ read IRQ vector register: de-asserts nIRQ to processor (and clears interrupt)
        ldr     \irqstat, [\base, #(AT91_AIC_ISR - AT91_AIC)]   @ read interrupt source number
        teq     \irqstat, #0                                    @ ISR is 0 when no current interrupt, or spurious interrupt