On Sun, Aug 12, 2018 at 10:17:42AM +0530, Ajay Singh wrote:
> wilc_debug.o object file is included for both SDIO and SPI module. When
> anyone(either SDIO or SPI) module is compiled as loaded module and another
> as buildin module then below compilation error occurs.
>
> "drivers/staging/wilc1000/wilc_debugfs.o:(.data+0x10): undefined
> reference to `__this_module'"
>
> Moved the declaration of file_operation variable in SDIO/SPI files and
> pass this as parameter to wilc_debugfs_init(). Remove 'fops' element
> from 'wilc_debugfs_info_t' struct, as its not required.
>
> Fixes: 9abc44ba4e2f ("staging: wilc1000: fix TODO to compile spi and sdio components in single module")
> Reported-by: kbuild test robot <lkp@xxxxxxxxx>
> Signed-off-by: Ajay Singh <ajay.kathat@xxxxxxxxxxxxx>
> ---
> drivers/staging/wilc1000/linux_wlan.c | 1 -
> drivers/staging/wilc1000/wilc_debugfs.c | 23 ++++++-----------------
> drivers/staging/wilc1000/wilc_sdio.c | 7 +++++++
> drivers/staging/wilc1000/wilc_spi.c | 7 +++++++
> drivers/staging/wilc1000/wilc_wlan_if.h | 7 ++++++-
> 5 files changed, 26 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/staging/wilc1000/linux_wlan.c b/drivers/staging/wilc1000/linux_wlan.c
> index 01cf4bd..37885ad 100644
> --- a/drivers/staging/wilc1000/linux_wlan.c
> +++ b/drivers/staging/wilc1000/linux_wlan.c
> @@ -1062,7 +1062,6 @@ int wilc_netdev_init(struct wilc **wilc, struct device *dev, int io_type,
> if (!wl)
> return -ENOMEM;
>
> - wilc_debugfs_init();
> *wilc = wl;
> wl->io_type = io_type;
> wl->hif_func = ops;
> diff --git a/drivers/staging/wilc1000/wilc_debugfs.c b/drivers/staging/wilc1000/wilc_debugfs.c
> index c5f67c9..78c0831 100644
> --- a/drivers/staging/wilc1000/wilc_debugfs.c
> +++ b/drivers/staging/wilc1000/wilc_debugfs.c
> @@ -20,8 +20,8 @@ static struct dentry *wilc_dir;
> #define DBG_LEVEL_ALL (DEBUG | INFO | WRN | ERR)
> static atomic_t WILC_DEBUG_LEVEL = ATOMIC_INIT(ERR);
>
> -static ssize_t wilc_debug_level_read(struct file *file, char __user *userbuf,
> - size_t count, loff_t *ppos)
> +ssize_t wilc_debug_level_read(struct file *file, char __user *userbuf,
> + size_t count, loff_t *ppos)
> {
> char buf[128];
> int res = 0;
> @@ -36,9 +36,8 @@ static ssize_t wilc_debug_level_read(struct file *file, char __user *userbuf,
> return simple_read_from_buffer(userbuf, count, ppos, buf, res);
> }
>
> -static ssize_t wilc_debug_level_write(struct file *filp,
> - const char __user *buf, size_t count,
> - loff_t *ppos)
> +ssize_t wilc_debug_level_write(struct file *filp, const char __user *buf,
> + size_t count, loff_t *ppos)
> {
> int flag = 0;
> int ret;
> @@ -63,35 +62,25 @@ static ssize_t wilc_debug_level_write(struct file *filp,
> return count;
> }
>
> -#define FOPS(_open, _read, _write, _poll) { \
> - .owner = THIS_MODULE, \
> - .open = (_open), \
> - .read = (_read), \
> - .write = (_write), \
> - .poll = (_poll), \
> -}
> -
> struct wilc_debugfs_info_t {
> const char *name;
> int perm;
> unsigned int data;
> - const struct file_operations fops;
> };
>
> static struct wilc_debugfs_info_t debugfs_info = {
> "wilc_debug_level",
> 0666,
> (DEBUG | ERR),
> - FOPS(NULL, wilc_debug_level_read, wilc_debug_level_write, NULL),
> };
>
> -int wilc_debugfs_init(void)
> +int wilc_debugfs_init(const struct file_operations *fops)
> {
> struct wilc_debugfs_info_t *info = &debugfs_info;
>
> wilc_dir = debugfs_create_dir("wilc_wifi", NULL);
> debugfs_create_file(info->name, info->perm, wilc_dir, &info->data,
> - &info->fops);
> + fops);
>
> return 0;
> }
> diff --git a/drivers/staging/wilc1000/wilc_sdio.c b/drivers/staging/wilc1000/wilc_sdio.c
> index b2080d8..c1573f5 100644
> --- a/drivers/staging/wilc1000/wilc_sdio.c
> +++ b/drivers/staging/wilc1000/wilc_sdio.c
> @@ -103,6 +103,12 @@ static int wilc_sdio_cmd53(struct wilc *wilc, struct sdio_cmd53 *cmd)
> return ret;
> }
>
> +static const struct file_operations sdio_debug_fops = {
> + .owner = THIS_MODULE,
> + .read = wilc_debug_level_read,
> + .write = wilc_debug_level_write,
> +};
> +
> static int linux_sdio_probe(struct sdio_func *func,
> const struct sdio_device_id *id)
> {
> @@ -126,6 +132,7 @@ static int linux_sdio_probe(struct sdio_func *func,
> dev_err(&func->dev, "Couldn't initialize netdev\n");
> return ret;
> }
> + wilc_debugfs_init(&sdio_debug_fops);
> sdio_set_drvdata(func, wilc);
> wilc->dev = &func->dev;
> wilc->gpio_irq = gpio;
> diff --git a/drivers/staging/wilc1000/wilc_spi.c b/drivers/staging/wilc1000/wilc_spi.c
> index 5517477..0376649 100644
> --- a/drivers/staging/wilc1000/wilc_spi.c
> +++ b/drivers/staging/wilc1000/wilc_spi.c
> @@ -102,6 +102,12 @@ static u8 crc7(u8 crc, const u8 *buffer, u32 len)
>
> #define USE_SPI_DMA 0
>
> +static const struct file_operations spi_debug_fops = {
> + .owner = THIS_MODULE,
> + .read = wilc_debug_level_read,
> + .write = wilc_debug_level_write,
> +};
Wait, step back a second. Why all of this work for a debugfs file that
no one uses? In wilc_debugfs.c there seems to only provide a single
debugfs file to read and write a value that no one uses anywhere.
So why not a simple patch to just delete the wilc_debugfs.c file
entirely? Who even uses this debugfs file? And if they do, what is it
for? What am I missing about how this is used?
thanks,
greg k-h
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