linux-kernel - RE: [PATCH 1/4] add is_buffer_dma

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Date:	Tue, 9 Sep 2008 09:17:05 -0700
From:	"Luck, Tony" <tony.luck@...el.com>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	"mingo@...hat.com" <mingo@...hat.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Joerg Roedel <joerg.roedel@....com>
Subject: RE: [PATCH 1/4] add is_buffer_dma_capable helper function

+static inline int is_buffer_dma_capable(u64 mask, dma_addr_t addr, size_t size)
+{
+       return addr + size <= mask;
+}

Do we care about wrap-around (e.g. addr=0xffffffffffffffff size=2)?

-Tony
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