linux-kernel - [PATCH 1/1] ALSA: add dummy function to support shared mmap in nommu Blackfin arch (v3)

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Message-Id: <1220431134-7797-1-git-send-email-cooloney@kernel.org>
Date:	Wed,  3 Sep 2008 16:38:54 +0800
From:	Bryan Wu <cooloney@...nel.org>
To:	tiwai@...e.de
Cc:	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	Cliff Cai <cliff.cai@...log.com>,
	Mike Frysinger <vapier.adi@...il.com>,
	Bryan Wu <cooloney@...nel.org>
Subject: [PATCH 1/1] ALSA: add dummy function to support shared mmap in nommu Blackfin arch (v3)

From: Cliff Cai <cliff.cai@...log.com>

v2-v3:
 - when it is mmu arch, we define the dummy function to NULL

v1-v2:
 - only adding this dummy function in nommu arch

Cc: Mike Frysinger <vapier.adi@...il.com>
Signed-off-by: Cliff Cai <cliff.cai@...log.com>
Signed-off-by: Bryan Wu <cooloney@...nel.org>
---
 sound/core/pcm_native.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index c49b9d9..e2068a4 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -3391,6 +3391,16 @@ out:
 }
 #endif /* CONFIG_SND_SUPPORT_OLD_API */
 
+#ifndef CONFIG_MMU
+unsigned long dummy_get_unmapped_area(struct file *file, unsigned long addr,
+				      unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+	return 0;
+}
+#else
+# define dummy_get_unmapped_area NULL
+#endif
+
 /*
  *  Register section
  */
@@ -3407,6 +3417,7 @@ const struct file_operations snd_pcm_f_ops[2] = {
 		.compat_ioctl = 	snd_pcm_ioctl_compat,
 		.mmap =			snd_pcm_mmap,
 		.fasync =		snd_pcm_fasync,
+		.get_unmapped_area =	dummy_get_unmapped_area,
 	},
 	{
 		.owner =		THIS_MODULE,
@@ -3419,5 +3430,6 @@ const struct file_operations snd_pcm_f_ops[2] = {
 		.compat_ioctl = 	snd_pcm_ioctl_compat,
 		.mmap =			snd_pcm_mmap,
 		.fasync =		snd_pcm_fasync,
+		.get_unmapped_area =	dummy_get_unmapped_area,
 	}
 };
-- 
1.5.6
--
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