linux-kernel - Re: [PATCH] staging: ion: chunk_heap: use %pa for printing dma_addr

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Date:	Thu, 09 Apr 2015 16:20:13 -0700
From:	Mitchel Humpherys <mitchelh@...eaurora.org>
To:	Colin Cross <ccross@...roid.com>
Cc:	devel@...uxdriverproject.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Android Kernel Team <kernel-team@...roid.com>,
	John Stultz <john.stultz@...aro.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] staging: ion: chunk_heap: use %pa for printing dma_addr_t's

On Thu, Apr 09 2015 at 03:48:55 PM, Colin Cross <ccross@...roid.com> wrote:
> On Thu, Apr 9, 2015 at 3:31 PM, Mitchel Humpherys
> <mitchelh@...eaurora.org> wrote:
>> We're currently using %lu and %ld to print some variables of type
>> dma_addr_t, which results in the following warning when dma_addr_t is
>> 64-bits wide:
>>
>>     drivers/staging/android/ion/ion_chunk_heap.c: In function 'ion_chunk_heap_create':
>>     drivers/staging/android/ion/ion_chunk_heap.c:176:2: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'dma_addr_t' [-Wformat=]
>>       pr_info("%s: base %lu size %zu align %ld\n", __func__, chunk_heap->base,
>>       ^
>>     drivers/staging/android/ion/ion_chunk_heap.c:176:2: warning: format '%ld' expects argument of type 'long int', but argument 5 has type 'dma_addr_t' [-Wformat=]
>>
>> Fix this by using %pa as instructed in printk-formats.txt.
>
> According to printk-formats.txt, dma_addr_t needs to be printed with %pad.

Ah good catch.  I'll send a v2.

I need to check printk-formats.txt more often...  :)


-Mitch

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