Need add type cast, or can not notice the failure. The related warning (allmodconfig, "EXTRA_CFLAGS=-W"): arch/arm/mach-omap2/gpmc.c:728:2: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits] Signed-off-by: Chen Gang <gang.chen@xxxxxxxxxxx> --- arch/arm/mach-omap2/gpmc.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c index f3fdd6a..62377b5 100644 --- a/arch/arm/mach-omap2/gpmc.c +++ b/arch/arm/mach-omap2/gpmc.c @@ -725,7 +725,7 @@ static int gpmc_setup_irq(void) return -EINVAL; gpmc_irq_start = irq_alloc_descs(-1, 0, GPMC_NR_IRQ, 0); - if (gpmc_irq_start < 0) { + if ((signed)gpmc_irq_start < 0) { pr_err("irq_alloc_descs failed\n"); return gpmc_irq_start; } -- 1.7.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html