diff options
Diffstat (limited to 'drivers/char/mem.c')
| -rw-r--r-- | drivers/char/mem.c | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 1052b0f2d4..3c6670cf90 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -31,10 +31,6 @@ #include <linux/uaccess.h> #include <linux/security.h> -#ifdef CONFIG_IA64 -# include <linux/efi.h> -#endif - #define DEVMEM_MINOR 1 #define DEVPORT_MINOR 4 @@ -277,13 +273,6 @@ int __weak phys_mem_access_prot_allowed(struct file *file, #ifdef pgprot_noncached static int uncached_access(struct file *file, phys_addr_t addr) { -#if defined(CONFIG_IA64) - /* - * On ia64, we ignore O_DSYNC because we cannot tolerate memory - * attribute aliases. - */ - return !(efi_mem_attributes(addr) & EFI_MEMORY_WB); -#else /* * Accessing memory above the top the kernel knows about or through a * file pointer @@ -292,7 +281,6 @@ static int uncached_access(struct file *file, phys_addr_t addr) if (file->f_flags & O_DSYNC) return 1; return addr >= __pa(high_memory); -#endif } #endif @@ -640,6 +628,7 @@ static int open_port(struct inode *inode, struct file *filp) #define full_lseek null_lseek #define write_zero write_null #define write_iter_zero write_iter_null +#define splice_write_zero splice_write_null #define open_mem open_port static const struct file_operations __maybe_unused mem_fops = { @@ -677,6 +666,8 @@ static const struct file_operations zero_fops = { .read_iter = read_iter_zero, .read = read_zero, .write_iter = write_iter_zero, + .splice_read = copy_splice_read, + .splice_write = splice_write_zero, .mmap = mmap_zero, .get_unmapped_area = get_unmapped_area_zero, #ifndef CONFIG_MMU @@ -688,6 +679,7 @@ static const struct file_operations full_fops = { .llseek = full_lseek, .read_iter = read_iter_zero, .write = write_full, + .splice_read = copy_splice_read, }; static const struct memdev { |