| Message ID | 1439653971-867-1-git-send-email-dirk.behme@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 15.08.2015 17:52, Dirk Behme wrote: > Fix the compiler warning > > ./arch/arm/include/asm/dma-mapping.h: In function ‘dma_mapping_error’: > ./arch/arm/include/asm/dma-mapping.h:176:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] > return dma_addr == DMA_ERROR_CODE; > ^ > > we get building the kernel with W=1. > > This is done the same way we have already in the arm64 version. > > Signed-off-by: Dirk Behme <dirk.behme@gmail.com> > --- > arch/arm/include/asm/dma-mapping.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h > index b52101d..68e41e8 100644 > --- a/arch/arm/include/asm/dma-mapping.h > +++ b/arch/arm/include/asm/dma-mapping.h > @@ -14,7 +14,7 @@ > #include <xen/xen.h> > #include <asm/xen/hypervisor.h> > > -#define DMA_ERROR_CODE (~0) > +#define DMA_ERROR_CODE (~(dma_addr_t)0) > extern struct dma_map_ops arm_dma_ops; > extern struct dma_map_ops arm_coherent_dma_ops; I've put this as 8420/1 into the patch system: http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8420/1 Any comments on this? Best regards Dirk
On Wed, Sep 23, 2015 at 11:38:24AM +0200, Dirk Behme wrote: > On 15.08.2015 17:52, Dirk Behme wrote: > >Fix the compiler warning > > > >./arch/arm/include/asm/dma-mapping.h: In function ‘dma_mapping_error’: > >./arch/arm/include/asm/dma-mapping.h:176:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] > > return dma_addr == DMA_ERROR_CODE; > > ^ > > > >we get building the kernel with W=1. > > > >This is done the same way we have already in the arm64 version. > > > >Signed-off-by: Dirk Behme <dirk.behme@gmail.com> > >--- > > arch/arm/include/asm/dma-mapping.h | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > >diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h > >index b52101d..68e41e8 100644 > >--- a/arch/arm/include/asm/dma-mapping.h > >+++ b/arch/arm/include/asm/dma-mapping.h > >@@ -14,7 +14,7 @@ > > #include <xen/xen.h> > > #include <asm/xen/hypervisor.h> > > > >-#define DMA_ERROR_CODE (~0) > >+#define DMA_ERROR_CODE (~(dma_addr_t)0) > > extern struct dma_map_ops arm_dma_ops; > > extern struct dma_map_ops arm_coherent_dma_ops; > > > I've put this as 8420/1 into the patch system: > > http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8420/1 > > Any comments on this? The reason your patch didn't get applied is because of: commit 96231b2686b53f71838a335bdc404cb5285d1a01 Author: Marek Szyprowski <m.szyprowski@samsung.com> Date: Tue Aug 18 09:14:15 2015 +0100 ARM: 8419/1: dma-mapping: harmonize definition of DMA_ERROR_CODE All architectures except arm that define DMA_ERROR_CODE are casting it to (dma_addr_t) - as it is always compared to dma_addr_t in arm as well this could be harmonized. Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org> Acked-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> which does exactly the same thing as your patch, and first appeared in June.
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index b52101d..68e41e8 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -14,7 +14,7 @@ #include <xen/xen.h> #include <asm/xen/hypervisor.h> -#define DMA_ERROR_CODE (~0) +#define DMA_ERROR_CODE (~(dma_addr_t)0) extern struct dma_map_ops arm_dma_ops; extern struct dma_map_ops arm_coherent_dma_ops;
Fix the compiler warning ./arch/arm/include/asm/dma-mapping.h: In function ‘dma_mapping_error’: ./arch/arm/include/asm/dma-mapping.h:176:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] return dma_addr == DMA_ERROR_CODE; ^ we get building the kernel with W=1. This is done the same way we have already in the arm64 version. Signed-off-by: Dirk Behme <dirk.behme@gmail.com> --- arch/arm/include/asm/dma-mapping.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)