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| author |  Niklas Schnelle <schnelle@linux.ibm.com>
| 2024-04-04 13:49:17 +0200 |
|---|---|---|
| committer |  Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| 2024-04-11 15:26:55 +0200 |
| commit | f0a816fb12dadd21326a7c0e54e3253f69d895d5 (patch) | |
| tree | a68de960d76e7d1143fc11a77b2f23009b0802e3 | |
| parent | parport: mfc3: avoid empty-body warning (diff) | |
| download | linux-f0a816fb12dadd21326a7c0e54e3253f69d895d5.tar.gz linux-f0a816fb12dadd21326a7c0e54e3253f69d895d5.tar.bz2 linux-f0a816fb12dadd21326a7c0e54e3253f69d895d5.zip | |
/dev/port: don't compile file operations without CONFIG_DEVPORT
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>
| -rw-r--r-- | drivers/char/mem.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 3c6670cf905f..7904e2bb6427 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -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, |