linux-kernel - Re: [PATCH 2/5] swiotlb: fix compile warning

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Date:	Wed, 25 Mar 2009 12:52:45 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	beckyb@...nel.crashing.org
Cc:	fujita.tomonori@....ntt.co.jp, linux-kernel@...r.kernel.org,
	mingo@...e.hu, ian.campbell@...rix.com, jeremy@...p.org
Subject: Re: [PATCH 2/5] swiotlb: fix compile warning

On Tue, 24 Mar 2009 22:42:33 -0500
Becky Bruce <beckyb@...nel.crashing.org> wrote:

> 
> On Mar 24, 2009, at 9:58 PM, FUJITA Tomonori wrote:
> 
> > On Tue, 24 Mar 2009 16:28:43 -0500
> > Becky Bruce <beckyb@...nel.crashing.org> wrote:
> >
> >> Squash a build warning seen on 32-bit powerpc caused by calling min()
> >> with 2 different types.  Cast the first arg to size_t, which is the
> >> type of the second, and should be portable across architectures.
> >>
> >> Signed-off-by: Becky Bruce <beckyb@...nel.crashing.org>
> >> ---
> >> lib/swiotlb.c |    2 +-
> >> 1 files changed, 1 insertions(+), 1 deletions(-)
> >>
> >> diff --git a/lib/swiotlb.c b/lib/swiotlb.c
> >> index f59cf30..62f5f75 100644
> >> --- a/lib/swiotlb.c
> >> +++ b/lib/swiotlb.c
> >> @@ -341,7 +341,7 @@ static void swiotlb_bounce(phys_addr_t phys,  
> >> char *dma_addr, size_t size,
> >> 		unsigned long flags;
> >>
> >> 		while (size) {
> >> -			sz = min(PAGE_SIZE - offset, size);
> >> +			sz = min((size_t)(PAGE_SIZE - offset), size);
> >>
> >> 			local_irq_save(flags);
> >> 			buffer = kmap_atomic(pfn_to_page(pfn),
> >
> > ?
> >
> > diff --git a/lib/swiotlb.c b/lib/swiotlb.c
> > index f59cf30..fa62498 100644
> > --- a/lib/swiotlb.c
> > +++ b/lib/swiotlb.c
> > @@ -341,7 +341,7 @@ static void swiotlb_bounce(phys_addr_t phys,  
> > char *dma_addr, size_t size,
> > 		unsigned long flags;
> >
> > 		while (size) {
> > -			sz = min(PAGE_SIZE - offset, size);
> > +			sz = min_t(size_t, PAGE_SIZE - offset, size);
> >
> > 			local_irq_save(flags);
> > 			buffer = kmap_atomic(pfn_to_page(pfn),
> 
> OK, we're clearly pointed at different trees here, and it looks like  
> I'm behind - this patch is based on Ingo's master.  Which tree has  
> this change?

I also use tip/master. I think that we are on the same page. No tree
has this change. I just send it because I'm not sure why you don't use
min_t().
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