Re: alsa-driver-1.0.15rc2 build issues on RHEL4/CentOS4

[James Pearson <james-p@moving-picture.com>]

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James Pearson wrote:

> 
> I've just discovered that I can't load snd-ioctl32 from 1.0.15rc2 on 
> RHEL4/CentOS4 - dmesg reports:
> 
> snd_ioctl32: Unknown symbol snd_ctl_elem_read
> snd_ioctl32: Unknown symbol snd_ctl_elem_write
> 
> snd-ioctl32 with 1.0.15rc1 loads fine ...

The problem is still there with 1.0.15rc3 - however, I've found the 
cause of the issue:

EXPORT_SYMBOL(snd_ctl_elem_read) and EXPORT_SYMBOL(snd_ctl_elem_write) 
have been removed from alsa-kernel/core/control.c - see:

<http://hg.alsa-project.org/alsa-kernel/rev/efd5ab99655e>

I guess this is OK for more recent kernels, but still needed for 
RHEL4/CentOS4 2.6.9 kernels

I can work round the problem by putting these back into acore/control.c

I've attached a patch which patches acore/control.patch

James Pearson

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--- ./acore/control.patch.dist	2007-09-21 09:41:25.000000000 +0100
+++ ./acore/control.patch	2007-09-26 12:07:14.809107031 +0100
@@ -1,5 +1,5 @@
---- ../alsa-kernel/core/control.c	2007-05-17 08:15:24.000000000 +0200
-+++ control.c	2007-05-24 21:25:20.000000000 +0200
+--- ../alsa-kernel/core/control.c	2007-09-21 09:41:26.000000000 +0100
++++ control.c	2007-09-26 12:06:00.936446240 +0100
 @@ -1,3 +1,4 @@
 +#define __NO_VERSION__
  /*
@@ -13,7 +13,25 @@
  #include <linux/slab.h>
  #include <linux/vmalloc.h>
  #include <linux/time.h>
-@@ -1387,25 +1389,44 @@
+@@ -716,6 +718,8 @@ int snd_ctl_elem_read(struct snd_card *c
+ 	return result;
+ }
+ 
++EXPORT_SYMBOL(snd_ctl_elem_read);
++
+ static int snd_ctl_elem_read_user(struct snd_card *card,
+ 				  struct snd_ctl_elem_value __user *_control)
+ {
+@@ -779,6 +783,8 @@ int snd_ctl_elem_write(struct snd_card *
+ 	return result;
+ }
+ 
++EXPORT_SYMBOL(snd_ctl_elem_write);
++
+ static int snd_ctl_elem_write_user(struct snd_ctl_file *file,
+ 				   struct snd_ctl_elem_value __user *_control)
+ {
+@@ -1383,25 +1389,44 @@ static int snd_ctl_fasync(int fd, struct
  /*
   * ioctl32 compat
   */

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