diff options
Diffstat (limited to 'drivers/char/mem.c')
| -rw-r--r-- | drivers/char/mem.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 1c596b5cdb27..7cb861e0a001 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -10,6 +10,7 @@ */ #include <linux/mm.h> +#include <linux/moduleparam.h> #include <linux/miscdevice.h> #include <linux/slab.h> #include <linux/vmalloc.h> @@ -743,6 +744,12 @@ static char *mem_devnode(struct device *dev, umode_t *mode) return NULL; } +#ifdef CONFIG_DEVMEM_BOOTPARAM +static bool devmem; +module_param(devmem, bool, 0444); +MODULE_PARM_DESC(devmem, "kernel parameter to activate /dev/mem"); +#endif + static struct class *mem_class; static int __init chr_dev_init(void) @@ -761,6 +768,10 @@ static int __init chr_dev_init(void) if (!devlist[minor].name) continue; +#ifdef CONFIG_DEVMEM_BOOTPARAM + if (minor == DEVMEM_MINOR && !devmem) + continue; +#endif /* * Create /dev/port? */ |