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

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Message-Id: <20090325114023S.fujita.tomonori@lab.ntt.co.jp>
Date:	Wed, 25 Mar 2009 11:58:23 +0900
From:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
To:	beckyb@...nel.crashing.org
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu,
	fujita.tomonori@....ntt.co.jp, ian.campbell@...rix.com,
	jeremy@...p.org
Subject: Re: [PATCH 2/5] swiotlb: fix compile warning

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),
--
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