linux-kernel - Re: [PATCH] UML: Fix some apparent bitrot

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Message-ID: <20090622024610.GC5893@cr0.nay.redhat.com>
Date:	Mon, 22 Jun 2009 10:46:10 +0800
From:	Amerigo Wang <xiyou.wangcong@...il.com>
To:	Paul Menage <menage@...gle.com>
Cc:	akpm@...ux-foundation.org, jdike@...toit.com,
	user-mode-linux-devel@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] UML: Fix some apparent bitrot

On Fri, Jun 19, 2009 at 05:55:24PM -0700, Paul Menage wrote:
>UML: Fix some apparent bitrot
>
>- migration of net_device methods into net_device_ops
>- dma_sync_single() changes
>- cpumask_clear() -> cpumask_clear_cpu()
>
>Signed-off-by: Paul Menage <menage@...gle.com>


Looks good.

Acked-by: WANG Cong <xiyou.wangcong@...il.com>


>
>--
>
>Fixes the following compile errors:
>
>include/linux/dma-mapping.h:113: error: redefinition of 'dma_sync_single'
>arch/um/include/asm/dma-mapping.h:84: error: previous definition of 'dma_sync_single' was here
>include/linux/dma-mapping.h: In function 'dma_sync_single':
>include/linux/dma-mapping.h:117: error: implicit declaration of function 'dma_sync_single_for_cpu'
>include/linux/dma-mapping.h: At top level:
>include/linux/dma-mapping.h:120: error: redefinition of 'dma_sync_sg'
>arch/um/include/asm/dma-mapping.h:91: error: previous definition of 'dma_sync_sg' was here
>include/linux/dma-mapping.h: In function 'dma_sync_sg':
>include/linux/dma-mapping.h:124: error: implicit declaration of function 'dma_sync_sg_for_cpu'
>
>
>arch/um/drivers/slirp_kern.c: In function 'slirp_init':
>arch/um/drivers/slirp_kern.c:35: error: 'struct net_device' has no member named 'init'
>
>
>arch/um/include/asm/mmu_context.h: In function 'switch_mm':
>arch/um/include/asm/mmu_context.h:38: warning: passing argument 1 of 'cpumask_clear' makes pointer from integer without
>a cast
>arch/um/include/asm/mmu_context.h:38: error: too many arguments to function 'cpumask_clear'
>
>---
>
> arch/um/drivers/slip_kern.c       |    1 -
> arch/um/drivers/slirp_kern.c      |    1 -
> arch/um/include/asm/dma-mapping.h |    4 ++--
> arch/um/include/asm/mmu_context.h |    2 +-
> 4 files changed, 3 insertions(+), 5 deletions(-)
>
>diff --git a/arch/um/drivers/slip_kern.c b/arch/um/drivers/slip_kern.c
>index 5ec1756..dd2aadc 100644
>--- a/arch/um/drivers/slip_kern.c
>+++ b/arch/um/drivers/slip_kern.c
>@@ -30,7 +30,6 @@ static void slip_init(struct net_device *dev, void *data)
> 
> 	slip_proto_init(&spri->slip);
> 
>-	dev->init = NULL;
> 	dev->hard_header_len = 0;
> 	dev->header_ops = NULL;
> 	dev->addr_len = 0;
>diff --git a/arch/um/drivers/slirp_kern.c b/arch/um/drivers/slirp_kern.c
>index f15a6e7..e376284 100644
>--- a/arch/um/drivers/slirp_kern.c
>+++ b/arch/um/drivers/slirp_kern.c
>@@ -32,7 +32,6 @@ void slirp_init(struct net_device *dev, void *data)
> 
> 	slip_proto_init(&spri->slip);
> 
>-	dev->init = NULL;
> 	dev->hard_header_len = 0;
> 	dev->header_ops = NULL;
> 	dev->addr_len = 0;
>diff --git a/arch/um/include/asm/dma-mapping.h b/arch/um/include/asm/dma-mapping.h
>index 90fc708..378de4b 100644
>--- a/arch/um/include/asm/dma-mapping.h
>+++ b/arch/um/include/asm/dma-mapping.h
>@@ -79,14 +79,14 @@ dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
> }
> 
> static inline void
>-dma_sync_single(struct device *dev, dma_addr_t dma_handle, size_t size,
>+dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
> 		enum dma_data_direction direction)
> {
> 	BUG();
> }
> 
> static inline void
>-dma_sync_sg(struct device *dev, struct scatterlist *sg, int nelems,
>+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
> 	    enum dma_data_direction direction)
> {
> 	BUG();
>diff --git a/arch/um/include/asm/mmu_context.h b/arch/um/include/asm/mmu_context.h
>index edd719e..34d8130 100644
>--- a/arch/um/include/asm/mmu_context.h
>+++ b/arch/um/include/asm/mmu_context.h
>@@ -35,7 +35,7 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
> 	unsigned cpu = smp_processor_id();
> 
> 	if(prev != next){
>-		cpumask_clear(cpu, mm_cpumask(prev));
>+		cpumask_clear_cpu(cpu, mm_cpumask(prev));
> 		cpumask_set_cpu(cpu, mm_cpumask(next));
> 		if(next != &init_mm)
> 			__switch_mm(&next->context.id);
>
>--
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