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Non-DT irq handlers were working through irq causes from most-significant to least-significant bit, while DT irqchip driver does it the other way round. This revealed some more HW issues on Kirkwood peripheral IP, where spurious sdio irqs can happen although irqs are masked. Also, the generated binaries show that original non-DT order compared to DT order save two instructions for each bit count check: irqchip DT order with ffs(): 60: e3a06001 mov r6, #1 64: e2643000 rsb r3, r4, #0 68: e0033004 and r3, r3, r4 6c: e16f3f13 clz r3, r3 70: e263301f rsb r3, r3, #31 74: e1c44316 bic r4, r4, r6, lsl r3 78: e5971004 ldr r1, [r7, #4] Original non-DT order with fls(): 60: e3a07001 mov r7, #1 64: e16f3f14 clz r3, r4 68: e263301f rsb r3, r3, #31 6c: e1c44317 bic r4, r4, r7, lsl r3 70: e5951004 ldr r1, [r5, #4] Therefore, reverse irq bit handling back to original order by replacing ffs() with fls(). Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Link: https://lkml.kernel.org/r/1398719528-23607-1-git-send-email-sebastian.hesselbarth@gmail.com Acked-by: Jason Cooper <jason@lakedaemon.net> Signed-off-by: Jason Cooper <jason@lakedaemon.net> |
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| .. | ||
| exynos-combiner.c | ||
| irq-armada-370-xp.c | ||
| irq-bcm2835.c | ||
| irq-clps711x.c | ||
| irq-crossbar.c | ||
| irq-dw-apb-ictl.c | ||
| irq-gic.c | ||
| irq-imgpdc.c | ||
| irq-metag-ext.c | ||
| irq-metag.c | ||
| irq-mmp.c | ||
| irq-moxart.c | ||
| irq-mxs.c | ||
| irq-nvic.c | ||
| irq-orion.c | ||
| irq-renesas-intc-irqpin.c | ||
| irq-renesas-irqc.c | ||
| irq-s3c24xx.c | ||
| irq-sirfsoc.c | ||
| irq-sun4i.c | ||
| irq-sunxi-nmi.c | ||
| irq-tb10x.c | ||
| irq-versatile-fpga.c | ||
| irq-vic.c | ||
| irq-vt8500.c | ||
| irq-xtensa-mx.c | ||
| irq-xtensa-pic.c | ||
| irq-zevio.c | ||
| irqchip.c | ||
| irqchip.h | ||
| Kconfig | ||
| Makefile | ||
| spear-shirq.c | ||