Re: [PATCH] cxl: Fix ambiguous else warnings
From: Thomas Huth <hidden>
Date: 2015-07-31 09:28:29
On 31/07/15 08:35, Daniel Axtens wrote:
quoted hunk ↗ jump to hunk
Every time I build cxl I see the following warnings: /scratch/dja/linux-capi/drivers/misc/cxl/pci.c: In function ‘sanitise_afu_regs’: /scratch/dja/linux-capi/drivers/misc/cxl/pci.c:712:6: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (reg & CXL_PSL_DSISR_TRANS) ^ /scratch/dja/linux-capi/drivers/misc/cxl/irq.c: In function ‘fail_psl_irq’: /scratch/dja/linux-capi/drivers/misc/cxl/irq.c:184:5: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (irq_info->dsisr & CXL_PSL_DSISR_TRANS) ^ They're annoying. Fix them by inserting the braces. Signed-off-by: Daniel Axtens <redacted> --- drivers/misc/cxl/irq.c | 5 +++-- drivers/misc/cxl/pci.c | 5 +++-- 2 files changed, 6 insertions(+), 4 deletions(-)diff --git a/drivers/misc/cxl/irq.c b/drivers/misc/cxl/irq.c index 121ec48f3ab4..c11e583a15a9 100644 --- a/drivers/misc/cxl/irq.c +++ b/drivers/misc/cxl/irq.c@@ -181,10 +181,11 @@ static irqreturn_t cxl_irq(int irq, void *data, struct cxl_irq_info *irq_info) static irqreturn_t fail_psl_irq(struct cxl_afu *afu, struct cxl_irq_info *irq_info) { - if (irq_info->dsisr & CXL_PSL_DSISR_TRANS) + if (irq_info->dsisr & CXL_PSL_DSISR_TRANS) { cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_AE); - else + } else { cxl_p2n_write(afu, CXL_PSL_TFC_An, CXL_PSL_TFC_An_A); + } return IRQ_HANDLED; }
Why does your GCC complain here at all? The code doesn't look ambiguous to me... Which version of GCC are you using? I just did a quick test compile here, and these warnings do not occur for me. Thomas