diff options
Diffstat (limited to 'arch/um/os-Linux/file.c')
-rw-r--r-- | arch/um/os-Linux/file.c | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c index 5e9b8dcf34d..6f92f732d25 100644 --- a/arch/um/os-Linux/file.c +++ b/arch/um/os-Linux/file.c @@ -290,52 +290,8 @@ int os_seek_file(int fd, __u64 offset) return 0; } -static int fault_buffer(void *start, int len, - int (*copy_proc)(void *addr, void *buf, int len)) -{ - int page = getpagesize(), i; - char c; - - for(i = 0; i < len; i += page){ - if((*copy_proc)(start + i, &c, sizeof(c))) - return -EFAULT; - } - if((len % page) != 0){ - if((*copy_proc)(start + len - 1, &c, sizeof(c))) - return -EFAULT; - } - return 0; -} - -static int file_io(int fd, void *buf, int len, - int (*io_proc)(int fd, void *buf, int len), - int (*copy_user_proc)(void *addr, void *buf, int len)) -{ - int n, err; - - do { - n = (*io_proc)(fd, buf, len); - if((n < 0) && (errno == EFAULT)){ - err = fault_buffer(buf, len, copy_user_proc); - if(err) - return err; - n = (*io_proc)(fd, buf, len); - } - } while((n < 0) && (errno == EINTR)); - - if(n < 0) - return -errno; - return n; -} - int os_read_file(int fd, void *buf, int len) { - return file_io(fd, buf, len, (int (*)(int, void *, int)) read, - copy_from_user_proc); -} - -int os_read_file_k(int fd, void *buf, int len) -{ int n = read(fd, buf, len); if(n < 0) @@ -345,12 +301,6 @@ int os_read_file_k(int fd, void *buf, int len) int os_write_file(int fd, const void *buf, int len) { - return file_io(fd, (void *) buf, len, - (int (*)(int, void *, int)) write, copy_to_user_proc); -} - -int os_write_file_k(int fd, const void *buf, int len) -{ int n = write(fd, (void *) buf, len); if(n < 0) |