| Message ID | 20181025180525.28378-1-natechancellor@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | dmaengine: xilinx_dma: Remove __aligned attribute on zynqmp_dma_desc_ll | expand |
On Thu, Oct 25, 2018 at 11:06 AM Nathan Chancellor <natechancellor@gmail.com> wrote: > > Clang warns: > > drivers/dma/xilinx/zynqmp_dma.c:166:4: warning: attribute 'aligned' is > ignored, place it after "struct" to apply attribute to type declaration > [-Wignored-attributes] > }; __aligned(64) > ^ > ./include/linux/compiler_types.h:200:38: note: expanded from macro > '__aligned' > #define __aligned(x) __attribute__((aligned(x))) > ^ > 1 warning generated. > > As Nick pointed out in the previous version of this patch, the author > likely intended for this struct to be 8-byte (64-bit) aligned, not > 64-byte, which is the default. Remove the hanging __aligned attribute. Here was the v1 discussion, for reference. https://lkml.org/lkml/2018/9/12/4 Thanks for sending the update Nathan. One thing I recommend doing is including the version in the [PATCH] subject line, ie. [PATCH v2]. `git format-patch` can do this automatically for you, ex. $ git format-patch -v2 HEAD~ > > Fixes: b0cc417c1637 ("dmaengine: Add Xilinx zynqmp dma engine driver support") > Reported-by: Nick Desaulniers <ndesaulniers@google.com> > Suggested-by: Nick Desaulniers <ndesaulniers@google.com> > Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> > --- Then below this line, you can include the notes about v1 -> v2 changes. (interdiff notes to the reviewers that get discarded from the commit message). I think I've seen you use the versioning before, so sorry if I'm restating something you already know. Thanks for the patch. Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> > drivers/dma/xilinx/zynqmp_dma.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c > index c74a88b65039..73de6a6179fc 100644 > --- a/drivers/dma/xilinx/zynqmp_dma.c > +++ b/drivers/dma/xilinx/zynqmp_dma.c > @@ -163,7 +163,7 @@ struct zynqmp_dma_desc_ll { > u32 ctrl; > u64 nxtdscraddr; > u64 rsvd; > -}; __aligned(64) > +}; > > /** > * struct zynqmp_dma_desc_sw - Per Transaction structure > -- > 2.19.1 >
On Thu, Oct 25, 2018 at 11:11:22AM -0700, Nick Desaulniers wrote: > On Thu, Oct 25, 2018 at 11:06 AM Nathan Chancellor > <natechancellor@gmail.com> wrote: > > > > Clang warns: > > > > drivers/dma/xilinx/zynqmp_dma.c:166:4: warning: attribute 'aligned' is > > ignored, place it after "struct" to apply attribute to type declaration > > [-Wignored-attributes] > > }; __aligned(64) > > ^ > > ./include/linux/compiler_types.h:200:38: note: expanded from macro > > '__aligned' > > #define __aligned(x) __attribute__((aligned(x))) > > ^ > > 1 warning generated. > > > > As Nick pointed out in the previous version of this patch, the author > > likely intended for this struct to be 8-byte (64-bit) aligned, not > > 64-byte, which is the default. Remove the hanging __aligned attribute. > > Here was the v1 discussion, for reference. > https://lkml.org/lkml/2018/9/12/4 > > Thanks for sending the update Nathan. One thing I recommend doing is > including the version in the [PATCH] subject line, ie. [PATCH v2]. > `git format-patch` can do this automatically for you, ex. > $ git format-patch -v2 HEAD~ > > > > > Fixes: b0cc417c1637 ("dmaengine: Add Xilinx zynqmp dma engine driver support") > > Reported-by: Nick Desaulniers <ndesaulniers@google.com> > > Suggested-by: Nick Desaulniers <ndesaulniers@google.com> > > Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> > > --- > > Then below this line, you can include the notes about v1 -> v2 > changes. (interdiff notes to the reviewers that get discarded from the > commit message). I think I've seen you use the versioning before, so > sorry if I'm restating something you already know. > No, that's fine, I completely forgot all the versioning for this patch as I was rushing, sorry about that! > Thanks for the patch. > Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> > Thanks for the review! Nathan > > drivers/dma/xilinx/zynqmp_dma.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c > > index c74a88b65039..73de6a6179fc 100644 > > --- a/drivers/dma/xilinx/zynqmp_dma.c > > +++ b/drivers/dma/xilinx/zynqmp_dma.c > > @@ -163,7 +163,7 @@ struct zynqmp_dma_desc_ll { > > u32 ctrl; > > u64 nxtdscraddr; > > u64 rsvd; > > -}; __aligned(64) > > +}; > > > > /** > > * struct zynqmp_dma_desc_sw - Per Transaction structure > > -- > > 2.19.1 > > > > > -- > Thanks, > ~Nick Desaulniers
On Thu, Oct 25, 2018 at 11:14 AM Nathan Chancellor <natechancellor@gmail.com> wrote: > > On Thu, Oct 25, 2018 at 11:11:22AM -0700, Nick Desaulniers wrote: > > On Thu, Oct 25, 2018 at 11:06 AM Nathan Chancellor > > <natechancellor@gmail.com> wrote: > > > > > > Clang warns: > > > > > > drivers/dma/xilinx/zynqmp_dma.c:166:4: warning: attribute 'aligned' is > > > ignored, place it after "struct" to apply attribute to type declaration > > > [-Wignored-attributes] > > > }; __aligned(64) > > > ^ > > > ./include/linux/compiler_types.h:200:38: note: expanded from macro > > > '__aligned' > > > #define __aligned(x) __attribute__((aligned(x))) > > > ^ > > > 1 warning generated. > > > > > > As Nick pointed out in the previous version of this patch, the author > > > likely intended for this struct to be 8-byte (64-bit) aligned, not > > > 64-byte, which is the default. Remove the hanging __aligned attribute. > > > > Here was the v1 discussion, for reference. > > https://lkml.org/lkml/2018/9/12/4 > > > > Thanks for sending the update Nathan. One thing I recommend doing is > > including the version in the [PATCH] subject line, ie. [PATCH v2]. > > `git format-patch` can do this automatically for you, ex. > > $ git format-patch -v2 HEAD~ > > > > > > > > Fixes: b0cc417c1637 ("dmaengine: Add Xilinx zynqmp dma engine driver support") > > > Reported-by: Nick Desaulniers <ndesaulniers@google.com> > > > Suggested-by: Nick Desaulniers <ndesaulniers@google.com> > > > Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> > > > --- > > > > Then below this line, you can include the notes about v1 -> v2 > > changes. (interdiff notes to the reviewers that get discarded from the > > commit message). I think I've seen you use the versioning before, so > > sorry if I'm restating something you already know. > > > > No, that's fine, I completely forgot all the versioning for this patch > as I was rushing, sorry about that! No worries. There's a lot to juggle when sending a patch and I miss these all the time (did I run checkpatch, did I cc the folks added to v1 that get_maintainer did not suggest, did I ...) and the version info of the patch gets discarded anyways once committed. > > > Thanks for the patch. > > Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> > > > > Thanks for the review! > Nathan > > > > drivers/dma/xilinx/zynqmp_dma.c | 2 +- > > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > > > diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c > > > index c74a88b65039..73de6a6179fc 100644 > > > --- a/drivers/dma/xilinx/zynqmp_dma.c > > > +++ b/drivers/dma/xilinx/zynqmp_dma.c > > > @@ -163,7 +163,7 @@ struct zynqmp_dma_desc_ll { > > > u32 ctrl; > > > u64 nxtdscraddr; > > > u64 rsvd; > > > -}; __aligned(64) > > > +}; > > > > > > /** > > > * struct zynqmp_dma_desc_sw - Per Transaction structure > > > -- > > > 2.19.1 > > > > > > > > > -- > > Thanks, > > ~Nick Desaulniers
On 25-10-18, 11:05, Nathan Chancellor wrote: > Clang warns: > > drivers/dma/xilinx/zynqmp_dma.c:166:4: warning: attribute 'aligned' is > ignored, place it after "struct" to apply attribute to type declaration > [-Wignored-attributes] > }; __aligned(64) > ^ > ./include/linux/compiler_types.h:200:38: note: expanded from macro > '__aligned' > #define __aligned(x) __attribute__((aligned(x))) > ^ > 1 warning generated. > > As Nick pointed out in the previous version of this patch, the author > likely intended for this struct to be 8-byte (64-bit) aligned, not > 64-byte, which is the default. Remove the hanging __aligned attribute. Applied, thanks
diff --git a/drivers/dma/xilinx/zynqmp_dma.c b/drivers/dma/xilinx/zynqmp_dma.c index c74a88b65039..73de6a6179fc 100644 --- a/drivers/dma/xilinx/zynqmp_dma.c +++ b/drivers/dma/xilinx/zynqmp_dma.c @@ -163,7 +163,7 @@ struct zynqmp_dma_desc_ll { u32 ctrl; u64 nxtdscraddr; u64 rsvd; -}; __aligned(64) +}; /** * struct zynqmp_dma_desc_sw - Per Transaction structure
Clang warns: drivers/dma/xilinx/zynqmp_dma.c:166:4: warning: attribute 'aligned' is ignored, place it after "struct" to apply attribute to type declaration [-Wignored-attributes] }; __aligned(64) ^ ./include/linux/compiler_types.h:200:38: note: expanded from macro '__aligned' #define __aligned(x) __attribute__((aligned(x))) ^ 1 warning generated. As Nick pointed out in the previous version of this patch, the author likely intended for this struct to be 8-byte (64-bit) aligned, not 64-byte, which is the default. Remove the hanging __aligned attribute. Fixes: b0cc417c1637 ("dmaengine: Add Xilinx zynqmp dma engine driver support") Reported-by: Nick Desaulniers <ndesaulniers@google.com> Suggested-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> --- drivers/dma/xilinx/zynqmp_dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)