Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=92f4c701aad794de9e4cf7341d0a486aed027c46
Commit:     92f4c701aad794de9e4cf7341d0a486aed027c46
Parent:     884c3d751093446918c2f7a4b2c745f28cf91c39
Author:     Akinobu Mita <[EMAIL PROTECTED]>
AuthorDate: Wed May 9 02:33:32 2007 -0700
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Wed May 9 12:30:49 2007 -0700

    use simple_read_from_buffer() in fs/
    
    Cleanup using simple_read_from_buffer() in binfmt_misc, configfs, and sysfs.
    
    Cc: Greg Kroah-Hartman <[EMAIL PROTECTED]>
    Cc: Joel Becker <[EMAIL PROTECTED]>
    Signed-off-by: Akinobu Mita <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 fs/binfmt_misc.c   |   13 +------------
 fs/configfs/file.c |   33 ++-------------------------------
 fs/sysfs/file.c    |   33 ++-------------------------------
 3 files changed, 5 insertions(+), 74 deletions(-)

diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index 18657f0..72d0b41 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -675,19 +675,8 @@ static ssize_t
 bm_status_read(struct file *file, char __user *buf, size_t nbytes, loff_t 
*ppos)
 {
        char *s = enabled ? "enabled" : "disabled";
-       int len = strlen(s);
-       loff_t pos = *ppos;
 
-       if (pos < 0)
-               return -EINVAL;
-       if (pos >= len)
-               return 0;
-       if (len < pos + nbytes)
-               nbytes = len - pos;
-       if (copy_to_user(buf, s + pos, nbytes))
-               return -EFAULT;
-       *ppos = pos + nbytes;
-       return nbytes;
+       return simple_read_from_buffer(buf, nbytes, ppos, s, strlen(s));
 }
 
 static ssize_t bm_status_write(struct file * file, const char __user * buffer,
diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index d98be5e..3527c7c 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -77,36 +77,6 @@ static int fill_read_buffer(struct dentry * dentry, struct 
configfs_buffer * buf
        return ret;
 }
 
-
-/**
- *     flush_read_buffer - push buffer to userspace.
- *     @buffer:        data buffer for file.
- *     @userbuf:       user-passed buffer.
- *     @count:         number of bytes requested.
- *     @ppos:          file position.
- *
- *     Copy the buffer we filled in fill_read_buffer() to userspace.
- *     This is done at the reader's leisure, copying and advancing
- *     the amount they specify each time.
- *     This may be called continuously until the buffer is empty.
- */
-static int flush_read_buffer(struct configfs_buffer * buffer, char __user * 
buf,
-                            size_t count, loff_t * ppos)
-{
-       int error;
-
-       if (*ppos > buffer->count)
-               return 0;
-
-       if (count > (buffer->count - *ppos))
-               count = buffer->count - *ppos;
-
-       error = copy_to_user(buf,buffer->page + *ppos,count);
-       if (!error)
-               *ppos += count;
-       return error ? -EFAULT : count;
-}
-
 /**
  *     configfs_read_file - read an attribute.
  *     @file:  file pointer.
@@ -139,7 +109,8 @@ configfs_read_file(struct file *file, char __user *buf, 
size_t count, loff_t *pp
        }
        pr_debug("%s: count = %zd, ppos = %lld, buf = %s\n",
                 __FUNCTION__, count, *ppos, buffer->page);
-       retval = flush_read_buffer(buffer,buf,count,ppos);
+       retval = simple_read_from_buffer(buf, count, ppos, buffer->page,
+                                        buffer->count);
 out:
        up(&buffer->sem);
        return retval;
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 0e637ad..b502c71 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -111,36 +111,6 @@ static int fill_read_buffer(struct dentry * dentry, struct 
sysfs_buffer * buffer
        return ret;
 }
 
-
-/**
- *     flush_read_buffer - push buffer to userspace.
- *     @buffer:        data buffer for file.
- *     @buf:           user-passed buffer.
- *     @count:         number of bytes requested.
- *     @ppos:          file position.
- *
- *     Copy the buffer we filled in fill_read_buffer() to userspace.
- *     This is done at the reader's leisure, copying and advancing 
- *     the amount they specify each time.
- *     This may be called continuously until the buffer is empty.
- */
-static int flush_read_buffer(struct sysfs_buffer * buffer, char __user * buf,
-                            size_t count, loff_t * ppos)
-{
-       int error;
-
-       if (*ppos > buffer->count)
-               return 0;
-
-       if (count > (buffer->count - *ppos))
-               count = buffer->count - *ppos;
-
-       error = copy_to_user(buf,buffer->page + *ppos,count);
-       if (!error)
-               *ppos += count;
-       return error ? -EFAULT : count;
-}
-
 /**
  *     sysfs_read_file - read an attribute. 
  *     @file:  file pointer.
@@ -177,7 +147,8 @@ sysfs_read_file(struct file *file, char __user *buf, size_t 
count, loff_t *ppos)
        }
        pr_debug("%s: count = %zd, ppos = %lld, buf = %s\n",
                 __FUNCTION__, count, *ppos, buffer->page);
-       retval = flush_read_buffer(buffer,buf,count,ppos);
+       retval = simple_read_from_buffer(buf, count, ppos, buffer->page,
+                                        buffer->count);
 out:
        up(&buffer->sem);
        return retval;
-
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