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/dev/port: don't compile file operations without CONFIG_DEVPORT

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In the future inb() and friends will not be available when compiling
with CONFIG_HAS_IOPORT=n so we must only try to access them here if
CONFIG_DEVPORT is set which depends on HAS_IOPORT.

Co-developed-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Link: https://lore.kernel.org/r/20240404114917.3627747-2-schnelle@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Niklas Schnelle 2024-04-04 13:49:17 +02:00 committed by Greg Kroah-Hartman
parent 1d6b84d297
commit f0a816fb12
1 changed files with 5 additions and 1 deletions
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6
drivers/char/mem.c
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@ -383,6 +383,7 @@ static int mmap_mem(struct file *file, struct vm_area_struct *vma)
return 0;
}
#ifdef CONFIG_DEVPORT
static ssize_t read_port(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
{
@ -424,6 +425,7 @@ static ssize_t write_port(struct file *file, const char __user *buf,
*ppos = i;
return tmp-buf;
}
#endif
static ssize_t read_null(struct file *file, char __user *buf,
size_t count, loff_t *ppos)
@ -653,12 +655,14 @@ static const struct file_operations null_fops = {
.uring_cmd = uring_cmd_null,
};
static const struct file_operations __maybe_unused port_fops = {
#ifdef CONFIG_DEVPORT
static const struct file_operations port_fops = {
.llseek = memory_lseek,
.read = read_port,
.write = write_port,
.open = open_port,
};
#endif
static const struct file_operations zero_fops = {
.llseek = zero_lseek,