| Message ID | alpine.DEB.2.02.1405071234010.14596@kaball.uk.xensource.com |
|---|---|
| State | Superseded |
| Headers | show |
On 07/05/14 12:41, Stefano Stabellini wrote: > On Fri, 25 Apr 2014, Stefano Stabellini wrote: >> On Thu, 24 Apr 2014, David Vrabel wrote: >>> On 24/04/14 13:49, Julien Grall wrote: >>>> Hi David, >>>> >>>> On 04/24/2014 01:22 PM, David Vrabel wrote: >>>>> On 18/04/14 16:54, Julien Grall wrote: >>>>>> virt_to_pfn has been defined in asm/memory.h by the commit e26a9e0 "ARM: Better >>>>>> virt_to_page() handling" >>>>>> >>>>>> This will result of a compilation warning when CONFIG_XEN is enabled. >>>>>> >>>>>> arch/arm/include/asm/xen/page.h:80:0: warning: "virt_to_pfn" redefined [enabled by default] >>>>>> #define virt_to_pfn(v) (PFN_DOWN(__pa(v))) >>>>>> ^ >>>>>> In file included from arch/arm/include/asm/page.h:163:0, >>>>>> from arch/arm/include/asm/xen/page.h:4, >>>>>> from include/xen/page.h:4, >>>>>> from arch/arm/xen/grant-table.c:33: >>>>>> >>>>>> The definition in memory.h is nearly the same (it directly expand PFN_DOWN), >>>>>> so we can safely drop virt_to_pfn in xen include. >>>>> >>>>> >>>>> This breaks the arm build for me. >>>>> >>>>> /local/davidvr/work/k.org/tip/drivers/block/xen-blkfront.c: In function >>>>> ‘setup_blkring’: >>>>> /local/davidvr/work/k.org/tip/drivers/block/xen-blkfront.c:1236:2: >>>>> error: implicit declaration of function ‘virt_to_pfn’ >>>>> [-Werror=implicit-function-declaration] >>>>> err = xenbus_grant_ring(dev, virt_to_mfn(info->ring.sring)); >>>>> ^ >>>> >>>> I don't have any issue to build the following branch with this patch on: >>>> - v3.15-rc2 >>>> - xentip master >>>> - xentip for-linus-3.16 >>> >>> Applied to devel/for-linus-3.16. >>> >>> If something else turns up for 3.15 (and I remember) I'll take it for >>> 3.15 instead. >> >> David, >> thank you very much for taking the patch in my absence. >> >> Considering that the problem is affecting everybody enabling CONFIG_XEN >> on ARM on v3.15, I don't think we can wait for the next merge window to >> send this fix upstream. >> Too many warnings for too many people. > > Unfortunately this commit breaks arm64 compilation, as virt_to_pfn has > not been introduced to arm64/include/asm/memory.h. > Has the patch been sent upstream yet? No. > We need this additional change for arm64: > > diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h > index e94f945..993bce5 100644 > --- a/arch/arm64/include/asm/memory.h > +++ b/arch/arm64/include/asm/memory.h > @@ -138,6 +138,7 @@ static inline void *phys_to_virt(phys_addr_t x) > #define __pa(x) __virt_to_phys((unsigned long)(x)) > #define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x))) > #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) > +#define virt_to_pfn(x) __phys_to_pfn(__virt_to_phys(x)) This would need an ack from an arm64 maintainer. David -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
On Wed, 7 May 2014, David Vrabel wrote: > On 07/05/14 12:41, Stefano Stabellini wrote: > > On Fri, 25 Apr 2014, Stefano Stabellini wrote: > >> On Thu, 24 Apr 2014, David Vrabel wrote: > >>> On 24/04/14 13:49, Julien Grall wrote: > >>>> Hi David, > >>>> > >>>> On 04/24/2014 01:22 PM, David Vrabel wrote: > >>>>> On 18/04/14 16:54, Julien Grall wrote: > >>>>>> virt_to_pfn has been defined in asm/memory.h by the commit e26a9e0 "ARM: Better > >>>>>> virt_to_page() handling" > >>>>>> > >>>>>> This will result of a compilation warning when CONFIG_XEN is enabled. > >>>>>> > >>>>>> arch/arm/include/asm/xen/page.h:80:0: warning: "virt_to_pfn" redefined [enabled by default] > >>>>>> #define virt_to_pfn(v) (PFN_DOWN(__pa(v))) > >>>>>> ^ > >>>>>> In file included from arch/arm/include/asm/page.h:163:0, > >>>>>> from arch/arm/include/asm/xen/page.h:4, > >>>>>> from include/xen/page.h:4, > >>>>>> from arch/arm/xen/grant-table.c:33: > >>>>>> > >>>>>> The definition in memory.h is nearly the same (it directly expand PFN_DOWN), > >>>>>> so we can safely drop virt_to_pfn in xen include. > >>>>> > >>>>> > >>>>> This breaks the arm build for me. > >>>>> > >>>>> /local/davidvr/work/k.org/tip/drivers/block/xen-blkfront.c: In function > >>>>> ‘setup_blkring’: > >>>>> /local/davidvr/work/k.org/tip/drivers/block/xen-blkfront.c:1236:2: > >>>>> error: implicit declaration of function ‘virt_to_pfn’ > >>>>> [-Werror=implicit-function-declaration] > >>>>> err = xenbus_grant_ring(dev, virt_to_mfn(info->ring.sring)); > >>>>> ^ > >>>> > >>>> I don't have any issue to build the following branch with this patch on: > >>>> - v3.15-rc2 > >>>> - xentip master > >>>> - xentip for-linus-3.16 > >>> > >>> Applied to devel/for-linus-3.16. > >>> > >>> If something else turns up for 3.15 (and I remember) I'll take it for > >>> 3.15 instead. > >> > >> David, > >> thank you very much for taking the patch in my absence. > >> > >> Considering that the problem is affecting everybody enabling CONFIG_XEN > >> on ARM on v3.15, I don't think we can wait for the next merge window to > >> send this fix upstream. > >> Too many warnings for too many people. > > > > Unfortunately this commit breaks arm64 compilation, as virt_to_pfn has > > not been introduced to arm64/include/asm/memory.h. > > Has the patch been sent upstream yet? > > No. > > > We need this additional change for arm64: > > > > diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h > > index e94f945..993bce5 100644 > > --- a/arch/arm64/include/asm/memory.h > > +++ b/arch/arm64/include/asm/memory.h > > @@ -138,6 +138,7 @@ static inline void *phys_to_virt(phys_addr_t x) > > #define __pa(x) __virt_to_phys((unsigned long)(x)) > > #define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x))) > > #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) > > +#define virt_to_pfn(x) __phys_to_pfn(__virt_to_phys(x)) > > This would need an ack from an arm64 maintainer. Certainly. Catalin is in CC.
On Wed, May 07, 2014 at 05:58:21PM +0100, Stefano Stabellini wrote: > On Wed, 7 May 2014, David Vrabel wrote: > > On 07/05/14 12:41, Stefano Stabellini wrote: > > > On Fri, 25 Apr 2014, Stefano Stabellini wrote: > > >> On Thu, 24 Apr 2014, David Vrabel wrote: > > >>> On 24/04/14 13:49, Julien Grall wrote: > > >>>> Hi David, > > >>>> > > >>>> On 04/24/2014 01:22 PM, David Vrabel wrote: > > >>>>> On 18/04/14 16:54, Julien Grall wrote: > > >>>>>> virt_to_pfn has been defined in asm/memory.h by the commit e26a9e0 "ARM: Better > > >>>>>> virt_to_page() handling" > > >>>>>> > > >>>>>> This will result of a compilation warning when CONFIG_XEN is enabled. > > >>>>>> > > >>>>>> arch/arm/include/asm/xen/page.h:80:0: warning: "virt_to_pfn" redefined [enabled by default] > > >>>>>> #define virt_to_pfn(v) (PFN_DOWN(__pa(v))) > > >>>>>> ^ > > >>>>>> In file included from arch/arm/include/asm/page.h:163:0, > > >>>>>> from arch/arm/include/asm/xen/page.h:4, > > >>>>>> from include/xen/page.h:4, > > >>>>>> from arch/arm/xen/grant-table.c:33: > > >>>>>> > > >>>>>> The definition in memory.h is nearly the same (it directly expand PFN_DOWN), > > >>>>>> so we can safely drop virt_to_pfn in xen include. > > >>>>> > > >>>>> > > >>>>> This breaks the arm build for me. > > >>>>> > > >>>>> /local/davidvr/work/k.org/tip/drivers/block/xen-blkfront.c: In function > > >>>>> ‘setup_blkring’: > > >>>>> /local/davidvr/work/k.org/tip/drivers/block/xen-blkfront.c:1236:2: > > >>>>> error: implicit declaration of function ‘virt_to_pfn’ > > >>>>> [-Werror=implicit-function-declaration] > > >>>>> err = xenbus_grant_ring(dev, virt_to_mfn(info->ring.sring)); > > >>>>> ^ > > >>>> > > >>>> I don't have any issue to build the following branch with this patch on: > > >>>> - v3.15-rc2 > > >>>> - xentip master > > >>>> - xentip for-linus-3.16 > > >>> > > >>> Applied to devel/for-linus-3.16. > > >>> > > >>> If something else turns up for 3.15 (and I remember) I'll take it for > > >>> 3.15 instead. > > >> > > >> David, > > >> thank you very much for taking the patch in my absence. > > >> > > >> Considering that the problem is affecting everybody enabling CONFIG_XEN > > >> on ARM on v3.15, I don't think we can wait for the next merge window to > > >> send this fix upstream. > > >> Too many warnings for too many people. > > > > > > Unfortunately this commit breaks arm64 compilation, as virt_to_pfn has > > > not been introduced to arm64/include/asm/memory.h. > > > Has the patch been sent upstream yet? > > > > No. > > > > > We need this additional change for arm64: > > > > > > diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h > > > index e94f945..993bce5 100644 > > > --- a/arch/arm64/include/asm/memory.h > > > +++ b/arch/arm64/include/asm/memory.h > > > @@ -138,6 +138,7 @@ static inline void *phys_to_virt(phys_addr_t x) > > > #define __pa(x) __virt_to_phys((unsigned long)(x)) > > > #define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x))) > > > #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) > > > +#define virt_to_pfn(x) __phys_to_pfn(__virt_to_phys(x)) > > > > This would need an ack from an arm64 maintainer. > > Certainly. Catalin is in CC. Acked-by: Catalin Marinas <catalin.marinas@arm.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index e94f945..993bce5 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -138,6 +138,7 @@ static inline void *phys_to_virt(phys_addr_t x) #define __pa(x) __virt_to_phys((unsigned long)(x)) #define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x))) #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) +#define virt_to_pfn(x) __phys_to_pfn(__virt_to_phys(x)) /* * virt_to_page(k) convert a _valid_ virtual address to struct page *