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Subject[PATCHv2] isdn: reduce stack size of mISDN_dsp
From: Frank Seidel <frank@f-seidel.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@f-seidel.de>
---
drivers/isdn/mISDN/dsp_cmx.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

--- a/drivers/isdn/mISDN/dsp_cmx.c
+++ b/drivers/isdn/mISDN/dsp_cmx.c
@@ -1592,13 +1592,21 @@ dsp_cmx_send(void *arg)
struct dsp_conf_member *member;
struct dsp *dsp;
int mustmix, members;
- s32 mixbuffer[MAX_POLL+100], *c;
+ s32 *mixbuffer;
+ s32 *c;
u8 *p, *q;
int r, rr;
int jittercheck = 0, delay, i;
u_long flags;
u16 length, count;

+ mixbuffer = kmalloc(sizeof(*mixbuffer) * (MAX_POLL + 100), GFP_KERNEL);
+ if (!mixbuffer) {
+ printk(KERN_ERR "mISDN_dsp: cannot allocate buffer(%s)\n",
+ __func__);
+ return;
+ }
+
/* lock */
spin_lock_irqsave(&dsp_lock, flags);

@@ -1811,6 +1819,8 @@ dsp_cmx_send(void *arg)

/* unlock */
spin_unlock_irqrestore(&dsp_lock, flags);
+
+ kfree(mixbuffer);
}

/*


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