linux-stable/sound/oss/v_midi.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

290 lines
6.3 KiB
C

/*
* sound/oss/v_midi.c
*
* The low level driver for the Sound Blaster DS chips.
*
*
* Copyright (C) by Hannu Savolainen 1993-1996
*
* USS/Lite for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
* Version 2 (June 1991). See the "COPYING" file distributed with this software
* for more info.
* ??
*
* Changes
* Alan Cox Modularisation, changed memory allocations
* Christoph Hellwig Adapted to module_init/module_exit
*
* Status
* Untested
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include "sound_config.h"
#include "v_midi.h"
static vmidi_devc *v_devc[2] = { NULL, NULL};
static int midi1,midi2;
static void *midi_mem = NULL;
/*
* The DSP channel can be used either for input or output. Variable
* 'sb_irq_mode' will be set when the program calls read or write first time
* after open. Current version doesn't support mode changes without closing
* and reopening the device. Support for this feature may be implemented in a
* future version of this driver.
*/
static int v_midi_open (int dev, int mode,
void (*input) (int dev, unsigned char data),
void (*output) (int dev)
)
{
vmidi_devc *devc = midi_devs[dev]->devc;
unsigned long flags;
if (devc == NULL)
return -(ENXIO);
spin_lock_irqsave(&devc->lock,flags);
if (devc->opened)
{
spin_unlock_irqrestore(&devc->lock,flags);
return -(EBUSY);
}
devc->opened = 1;
spin_unlock_irqrestore(&devc->lock,flags);
devc->intr_active = 1;
if (mode & OPEN_READ)
{
devc->input_opened = 1;
devc->midi_input_intr = input;
}
return 0;
}
static void v_midi_close (int dev)
{
vmidi_devc *devc = midi_devs[dev]->devc;
unsigned long flags;
if (devc == NULL)
return;
spin_lock_irqsave(&devc->lock,flags);
devc->intr_active = 0;
devc->input_opened = 0;
devc->opened = 0;
spin_unlock_irqrestore(&devc->lock,flags);
}
static int v_midi_out (int dev, unsigned char midi_byte)
{
vmidi_devc *devc = midi_devs[dev]->devc;
vmidi_devc *pdevc;
if (devc == NULL)
return -ENXIO;
pdevc = midi_devs[devc->pair_mididev]->devc;
if (pdevc->input_opened > 0){
if (MIDIbuf_avail(pdevc->my_mididev) > 500)
return 0;
pdevc->midi_input_intr (pdevc->my_mididev, midi_byte);
}
return 1;
}
static inline int v_midi_start_read (int dev)
{
return 0;
}
static int v_midi_end_read (int dev)
{
vmidi_devc *devc = midi_devs[dev]->devc;
if (devc == NULL)
return -ENXIO;
devc->intr_active = 0;
return 0;
}
/* why -EPERM and not -EINVAL?? */
static inline int v_midi_ioctl (int dev, unsigned cmd, void __user *arg)
{
return -EPERM;
}
#define MIDI_SYNTH_NAME "Loopback MIDI"
#define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT
#include "midi_synth.h"
static struct midi_operations v_midi_operations =
{
.owner = THIS_MODULE,
.info = {"Loopback MIDI Port 1", 0, 0, SNDCARD_VMIDI},
.converter = &std_midi_synth,
.in_info = {0},
.open = v_midi_open,
.close = v_midi_close,
.ioctl = v_midi_ioctl,
.outputc = v_midi_out,
.start_read = v_midi_start_read,
.end_read = v_midi_end_read,
};
static struct midi_operations v_midi_operations2 =
{
.owner = THIS_MODULE,
.info = {"Loopback MIDI Port 2", 0, 0, SNDCARD_VMIDI},
.converter = &std_midi_synth,
.in_info = {0},
.open = v_midi_open,
.close = v_midi_close,
.ioctl = v_midi_ioctl,
.outputc = v_midi_out,
.start_read = v_midi_start_read,
.end_read = v_midi_end_read,
};
/*
* We kmalloc just one of these - it makes life simpler and the code
* cleaner and the memory handling far more efficient
*/
struct vmidi_memory
{
/* Must be first */
struct midi_operations m_ops[2];
struct synth_operations s_ops[2];
struct vmidi_devc v_ops[2];
};
static void __init attach_v_midi (struct address_info *hw_config)
{
struct vmidi_memory *m;
/* printk("Attaching v_midi device.....\n"); */
midi1 = sound_alloc_mididev();
if (midi1 == -1)
{
printk(KERN_ERR "v_midi: Too many midi devices detected\n");
return;
}
m = kmalloc(sizeof(struct vmidi_memory), GFP_KERNEL);
if (m == NULL)
{
printk(KERN_WARNING "Loopback MIDI: Failed to allocate memory\n");
sound_unload_mididev(midi1);
return;
}
midi_mem = m;
midi_devs[midi1] = &m->m_ops[0];
midi2 = sound_alloc_mididev();
if (midi2 == -1)
{
printk (KERN_ERR "v_midi: Too many midi devices detected\n");
kfree(m);
sound_unload_mididev(midi1);
return;
}
midi_devs[midi2] = &m->m_ops[1];
/* printk("VMIDI1: %d VMIDI2: %d\n",midi1,midi2); */
/* for MIDI-1 */
v_devc[0] = &m->v_ops[0];
memcpy ((char *) midi_devs[midi1], (char *) &v_midi_operations,
sizeof (struct midi_operations));
v_devc[0]->my_mididev = midi1;
v_devc[0]->pair_mididev = midi2;
v_devc[0]->opened = v_devc[0]->input_opened = 0;
v_devc[0]->intr_active = 0;
v_devc[0]->midi_input_intr = NULL;
spin_lock_init(&v_devc[0]->lock);
midi_devs[midi1]->devc = v_devc[0];
midi_devs[midi1]->converter = &m->s_ops[0];
std_midi_synth.midi_dev = midi1;
memcpy ((char *) midi_devs[midi1]->converter, (char *) &std_midi_synth,
sizeof (struct synth_operations));
midi_devs[midi1]->converter->id = "V_MIDI 1";
/* for MIDI-2 */
v_devc[1] = &m->v_ops[1];
memcpy ((char *) midi_devs[midi2], (char *) &v_midi_operations2,
sizeof (struct midi_operations));
v_devc[1]->my_mididev = midi2;
v_devc[1]->pair_mididev = midi1;
v_devc[1]->opened = v_devc[1]->input_opened = 0;
v_devc[1]->intr_active = 0;
v_devc[1]->midi_input_intr = NULL;
spin_lock_init(&v_devc[1]->lock);
midi_devs[midi2]->devc = v_devc[1];
midi_devs[midi2]->converter = &m->s_ops[1];
std_midi_synth.midi_dev = midi2;
memcpy ((char *) midi_devs[midi2]->converter, (char *) &std_midi_synth,
sizeof (struct synth_operations));
midi_devs[midi2]->converter->id = "V_MIDI 2";
sequencer_init();
/* printk("Attached v_midi device\n"); */
}
static inline int __init probe_v_midi(struct address_info *hw_config)
{
return(1); /* always OK */
}
static void __exit unload_v_midi(struct address_info *hw_config)
{
sound_unload_mididev(midi1);
sound_unload_mididev(midi2);
kfree(midi_mem);
}
static struct address_info cfg; /* dummy */
static int __init init_vmidi(void)
{
printk("MIDI Loopback device driver\n");
if (!probe_v_midi(&cfg))
return -ENODEV;
attach_v_midi(&cfg);
return 0;
}
static void __exit cleanup_vmidi(void)
{
unload_v_midi(&cfg);
}
module_init(init_vmidi);
module_exit(cleanup_vmidi);
MODULE_LICENSE("GPL");