1. 03 11月, 2010 2 次提交
  2. 02 11月, 2010 2 次提交
  3. 01 11月, 2010 3 次提交
  4. 31 10月, 2010 4 次提交
  5. 29 10月, 2010 1 次提交
  6. 27 10月, 2010 5 次提交
  7. 23 10月, 2010 1 次提交
  8. 22 10月, 2010 3 次提交
  9. 19 10月, 2010 4 次提交
  10. 18 10月, 2010 1 次提交
  11. 17 10月, 2010 1 次提交
  12. 15 10月, 2010 9 次提交
    • A
      llseek: automatically add .llseek fop · 6038f373
      Arnd Bergmann 提交于
      All file_operations should get a .llseek operation so we can make
      nonseekable_open the default for future file operations without a
      .llseek pointer.
      
      The three cases that we can automatically detect are no_llseek, seq_lseek
      and default_llseek. For cases where we can we can automatically prove that
      the file offset is always ignored, we use noop_llseek, which maintains
      the current behavior of not returning an error from a seek.
      
      New drivers should normally not use noop_llseek but instead use no_llseek
      and call nonseekable_open at open time.  Existing drivers can be converted
      to do the same when the maintainer knows for certain that no user code
      relies on calling seek on the device file.
      
      The generated code is often incorrectly indented and right now contains
      comments that clarify for each added line why a specific variant was
      chosen. In the version that gets submitted upstream, the comments will
      be gone and I will manually fix the indentation, because there does not
      seem to be a way to do that using coccinelle.
      
      Some amount of new code is currently sitting in linux-next that should get
      the same modifications, which I will do at the end of the merge window.
      
      Many thanks to Julia Lawall for helping me learn to write a semantic
      patch that does all this.
      
      ===== begin semantic patch =====
      // This adds an llseek= method to all file operations,
      // as a preparation for making no_llseek the default.
      //
      // The rules are
      // - use no_llseek explicitly if we do nonseekable_open
      // - use seq_lseek for sequential files
      // - use default_llseek if we know we access f_pos
      // - use noop_llseek if we know we don't access f_pos,
      //   but we still want to allow users to call lseek
      //
      @ open1 exists @
      identifier nested_open;
      @@
      nested_open(...)
      {
      <+...
      nonseekable_open(...)
      ...+>
      }
      
      @ open exists@
      identifier open_f;
      identifier i, f;
      identifier open1.nested_open;
      @@
      int open_f(struct inode *i, struct file *f)
      {
      <+...
      (
      nonseekable_open(...)
      |
      nested_open(...)
      )
      ...+>
      }
      
      @ read disable optional_qualifier exists @
      identifier read_f;
      identifier f, p, s, off;
      type ssize_t, size_t, loff_t;
      expression E;
      identifier func;
      @@
      ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
      {
      <+...
      (
         *off = E
      |
         *off += E
      |
         func(..., off, ...)
      |
         E = *off
      )
      ...+>
      }
      
      @ read_no_fpos disable optional_qualifier exists @
      identifier read_f;
      identifier f, p, s, off;
      type ssize_t, size_t, loff_t;
      @@
      ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
      {
      ... when != off
      }
      
      @ write @
      identifier write_f;
      identifier f, p, s, off;
      type ssize_t, size_t, loff_t;
      expression E;
      identifier func;
      @@
      ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
      {
      <+...
      (
        *off = E
      |
        *off += E
      |
        func(..., off, ...)
      |
        E = *off
      )
      ...+>
      }
      
      @ write_no_fpos @
      identifier write_f;
      identifier f, p, s, off;
      type ssize_t, size_t, loff_t;
      @@
      ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
      {
      ... when != off
      }
      
      @ fops0 @
      identifier fops;
      @@
      struct file_operations fops = {
       ...
      };
      
      @ has_llseek depends on fops0 @
      identifier fops0.fops;
      identifier llseek_f;
      @@
      struct file_operations fops = {
      ...
       .llseek = llseek_f,
      ...
      };
      
      @ has_read depends on fops0 @
      identifier fops0.fops;
      identifier read_f;
      @@
      struct file_operations fops = {
      ...
       .read = read_f,
      ...
      };
      
      @ has_write depends on fops0 @
      identifier fops0.fops;
      identifier write_f;
      @@
      struct file_operations fops = {
      ...
       .write = write_f,
      ...
      };
      
      @ has_open depends on fops0 @
      identifier fops0.fops;
      identifier open_f;
      @@
      struct file_operations fops = {
      ...
       .open = open_f,
      ...
      };
      
      // use no_llseek if we call nonseekable_open
      ////////////////////////////////////////////
      @ nonseekable1 depends on !has_llseek && has_open @
      identifier fops0.fops;
      identifier nso ~= "nonseekable_open";
      @@
      struct file_operations fops = {
      ...  .open = nso, ...
      +.llseek = no_llseek, /* nonseekable */
      };
      
      @ nonseekable2 depends on !has_llseek @
      identifier fops0.fops;
      identifier open.open_f;
      @@
      struct file_operations fops = {
      ...  .open = open_f, ...
      +.llseek = no_llseek, /* open uses nonseekable */
      };
      
      // use seq_lseek for sequential files
      /////////////////////////////////////
      @ seq depends on !has_llseek @
      identifier fops0.fops;
      identifier sr ~= "seq_read";
      @@
      struct file_operations fops = {
      ...  .read = sr, ...
      +.llseek = seq_lseek, /* we have seq_read */
      };
      
      // use default_llseek if there is a readdir
      ///////////////////////////////////////////
      @ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
      identifier fops0.fops;
      identifier readdir_e;
      @@
      // any other fop is used that changes pos
      struct file_operations fops = {
      ... .readdir = readdir_e, ...
      +.llseek = default_llseek, /* readdir is present */
      };
      
      // use default_llseek if at least one of read/write touches f_pos
      /////////////////////////////////////////////////////////////////
      @ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
      identifier fops0.fops;
      identifier read.read_f;
      @@
      // read fops use offset
      struct file_operations fops = {
      ... .read = read_f, ...
      +.llseek = default_llseek, /* read accesses f_pos */
      };
      
      @ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
      identifier fops0.fops;
      identifier write.write_f;
      @@
      // write fops use offset
      struct file_operations fops = {
      ... .write = write_f, ...
      +	.llseek = default_llseek, /* write accesses f_pos */
      };
      
      // Use noop_llseek if neither read nor write accesses f_pos
      ///////////////////////////////////////////////////////////
      
      @ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
      identifier fops0.fops;
      identifier read_no_fpos.read_f;
      identifier write_no_fpos.write_f;
      @@
      // write fops use offset
      struct file_operations fops = {
      ...
       .write = write_f,
       .read = read_f,
      ...
      +.llseek = noop_llseek, /* read and write both use no f_pos */
      };
      
      @ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
      identifier fops0.fops;
      identifier write_no_fpos.write_f;
      @@
      struct file_operations fops = {
      ... .write = write_f, ...
      +.llseek = noop_llseek, /* write uses no f_pos */
      };
      
      @ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
      identifier fops0.fops;
      identifier read_no_fpos.read_f;
      @@
      struct file_operations fops = {
      ... .read = read_f, ...
      +.llseek = noop_llseek, /* read uses no f_pos */
      };
      
      @ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
      identifier fops0.fops;
      @@
      struct file_operations fops = {
      ...
      +.llseek = noop_llseek, /* no read or write fn */
      };
      ===== End semantic patch =====
      Signed-off-by: NArnd Bergmann <arnd@arndb.de>
      Cc: Julia Lawall <julia@diku.dk>
      Cc: Christoph Hellwig <hch@infradead.org>
      6038f373
    • P
      ASoC: Add max98088 CODEC driver · e65d255a
      Peter Hsiang 提交于
      This patch adds the MAX98088 CODEC driver.
      Signed-off-by: NPeter Hsiang <peter.hsiang@maxim-ic.com>
      Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
      Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      e65d255a
    • M
      ASoC: ep93xx: add Simplemachines Sim.One AC97 audio support · d42a280d
      Mika Westerberg 提交于
      Add AC97 audio support for Simplemachines Sim.One board.
      Signed-off-by: NMika Westerberg <mika.westerberg@iki.fi>
      Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
      Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      d42a280d
    • M
      ASoC: add ep93xx AC97 audio driver · aa7e1b84
      Mika Westerberg 提交于
      Add support for AC97 controllers found in Cirrus Logic EP93xx family SoCs.
      Signed-off-by: NMika Westerberg <mika.westerberg@iki.fi>
      Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
      Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      aa7e1b84
    • K
      ASoC: ak4642: make sure name of register/value · a3471239
      Kuninori Morimoto 提交于
      This patch replace magic code with defined name,
      and remove unnecessary settings which set default value
      Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
      Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
      Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      a3471239
    • J
      ASoC: Remove unused vol field from WM8994 access mask table · c14c05c1
      Joe Perches 提交于
      Remove unused vol from struct access_mask
      
      Reduces object size ~3kb.
      
      $ size sound/soc/codecs/wm8994.o*
         text	   data	    bss	    dec	    hex	filename
        40727	   4384	   4480	  49591	   c1b7	sound/soc/codecs/wm8994.o.new
        43879	   4384	   4480	  52743	   ce07	sound/soc/codecs/wm8994.o.old
      Signed-off-by: NJoe Perches <joe@perches.com>
      Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
      Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      c14c05c1
    • K
      ASoC: fsi: simultaneous playback/recorde support · 93193c2b
      Kuninori Morimoto 提交于
      Current FSI driver had not cared about simultaneous
      playback/capture on same port.
      This patch add new fsi_stream struct to care it,
      Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
      Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
      Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      93193c2b
    • S
      ASoC: SAMSUNG: Add Machine driver for S/PDIF PCM audio · b67089e4
      Seungwhan Youn 提交于
      This patch add S/PDIF machine driver to support S/PDIF PCM audio
      on SMDKC100, SMDKC110 and SMDKV210 boards.
      Signed-off-by: NSeungwhan Youn <sw.youn@samsung.com>
      Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
      Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      b67089e4
    • S
      ASoC: SAMSUNG: Add S/PDIF CPU driver · fc127ccc
      Seungwhan Youn 提交于
      This patch adds S/PDIF CPU driver for various Samsung SoCs.
      Signed-off-by: NSeungwhan Youn <sw.youn@samsung.com>
      Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
      Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
      fc127ccc
  13. 13 10月, 2010 4 次提交