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drivers: char: mem: Simplify DEVKMEM configuration 

Simplify the use of CONFIG_DEVKMEM by making the kmem_fops
so that it is __maybe_unused.

This enabled the multiple #ifdef's used for this structure
to be removed and brings it in line with the use of CONFIG_DEVMEM

This change should introduce no functional changes.

Signed-off-by: Rob Ward <robert.ward114@googlemail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rob Ward 2014-12-07 15:40:34 +00:00 committed by Greg Kroah-Hartman
parent 73f0718e74
commit a8c912522b
1 changed files with 1 additions and 7 deletions
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8
drivers/char/mem.c
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@ -341,7 +341,6 @@ static int mmap_mem(struct file *file, struct vm_area_struct *vma)
return 0;
}
#ifdef CONFIG_DEVKMEM
static int mmap_kmem(struct file *file, struct vm_area_struct *vma)
{
unsigned long pfn;
@ -362,9 +361,7 @@ static int mmap_kmem(struct file *file, struct vm_area_struct *vma)
vma->vm_pgoff = pfn;
return mmap_mem(file, vma);
}
#endif
#ifdef CONFIG_DEVKMEM
/*
* This function reads the *virtual* memory as seen by the kernel.
*/
@ -544,7 +541,6 @@ static ssize_t write_kmem(struct file *file, const char __user *buf,
*ppos = p;
return virtr + wrote ? : err;
}
#endif
#ifdef CONFIG_DEVPORT
static ssize_t read_port(struct file *file, char __user *buf,
@ -724,8 +720,7 @@ static const struct file_operations __maybe_unused mem_fops = {
.get_unmapped_area = get_unmapped_area_mem,
};
#ifdef CONFIG_DEVKMEM
static const struct file_operations kmem_fops = {
static const struct file_operations __maybe_unused kmem_fops = {
.llseek = memory_lseek,
.read = read_kmem,
.write = write_kmem,
@ -733,7 +728,6 @@ static const struct file_operations kmem_fops = {
.open = open_kmem,
.get_unmapped_area = get_unmapped_area_mem,
};
#endif
static const struct file_operations null_fops = {
.llseek = null_lseek,