linux-kernel - [PATCH 09/19] Reduce stack size in dsp_cmx

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Date:	Tue, 19 May 2009 15:58:28 +0200
From:	Karsten Keil <keil@...systems.de>
To:	linux-kernel@...r.kernel.org
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	i4ldeveloper@...tserv.isdn4linux.de
Subject: [PATCH 09/19] Reduce stack size in dsp_cmx_send()

From: Frank Seidel <frank@...eidel.de>

Reduce stack size memory footprint of mISDN_dsp.
(From 1468 bytes for dsp_cmx_send on i386 down to 44).

Signed-off-by: Frank Seidel <frank@...eidel.de>
Signed-off-by: Andreas Eversberg <andreas@...rsberg.eu>
Signed-off-by: Karsten Keil <keil@...systems.de>
---
 drivers/isdn/hardware/mISDN/hfcmulti.c |    2 +-
 drivers/isdn/mISDN/dsp_cmx.c           |    3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
index 735d292..9d8c7ff 100644
--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
+++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
@@ -104,7 +104,7 @@
  *	If unsure, don't give this parameter.
  *
  * dslot:
- *	NOTE: only one poll value must be given for every card.
+ *	NOTE: only one dslot value must be given for every card.
  *	Also this value must be given for non-E1 cards. If omitted, the E1
  *	card has D-channel on time slot 16, which is default.
  *	If 1..15 or 17..31, an alternate time slot is used for D-channel.
diff --git a/drivers/isdn/mISDN/dsp_cmx.c b/drivers/isdn/mISDN/dsp_cmx.c
index 5e1d947..bae6d97 100644
--- a/drivers/isdn/mISDN/dsp_cmx.c
+++ b/drivers/isdn/mISDN/dsp_cmx.c
@@ -1596,7 +1596,8 @@ dsp_cmx_send(void *arg)
 	struct dsp_conf_member *member;
 	struct dsp *dsp;
 	int mustmix, members;
-	s32 mixbuffer[MAX_POLL+100], *c;
+	static s32 mixbuffer[MAX_POLL+100];
+	s32 *c;
 	u8 *p, *q;
 	int r, rr;
 	int jittercheck = 0, delay, i;
-- 
1.6.0.2

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