From 85badbdf5120d246ce2bb3f1a7689a805f9c9006 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Wed, 9 May 2007 02:33:33 -0700 Subject: [PATCH] use simple_read_from_buffer in kernel/ Cleanup using simple_read_from_buffer() for /dev/cpuset/tasks and /proc/config.gz. Cc: Paul Jackson Cc: Randy Dunlap Signed-off-by: Akinobu Mita Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/configs.c | 15 +++------------ kernel/cpuset.c | 7 +------ 2 files changed, 4 insertions(+), 18 deletions(-) diff --git a/kernel/configs.c b/kernel/configs.c index 8fa1fb28f8a..e84d3f9c6c7 100644 --- a/kernel/configs.c +++ b/kernel/configs.c @@ -61,18 +61,9 @@ static ssize_t ikconfig_read_current(struct file *file, char __user *buf, size_t len, loff_t * offset) { - loff_t pos = *offset; - ssize_t count; - - if (pos >= kernel_config_data_size) - return 0; - - count = min(len, (size_t)(kernel_config_data_size - pos)); - if (copy_to_user(buf, kernel_config_data + MAGIC_SIZE + pos, count)) - return -EFAULT; - - *offset += count; - return count; + return simple_read_from_buffer(buf, len, offset, + kernel_config_data + MAGIC_SIZE, + kernel_config_data_size); } static const struct file_operations ikconfig_file_ops = { diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 88b416dfbc7..f57854b0892 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -1772,12 +1772,7 @@ static ssize_t cpuset_tasks_read(struct file *file, char __user *buf, { struct ctr_struct *ctr = file->private_data; - if (*ppos + nbytes > ctr->bufsz) - nbytes = ctr->bufsz - *ppos; - if (copy_to_user(buf, ctr->buf + *ppos, nbytes)) - return -EFAULT; - *ppos += nbytes; - return nbytes; + return simple_read_from_buffer(buf, nbytes, ppos, ctr->buf, ctr->bufsz); } static int cpuset_tasks_release(struct inode *unused_inode, struct file *file) -- 2.20.1