On 31/07/15 08:35, Daniel Axtens wrote:
> 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 <d...@axtens.net>
> ---
> 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
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