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-rw-r--r--arch/um/os-Linux/file.c47
1 files changed, 7 insertions, 40 deletions
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index 371b4335f46..6f92f732d25 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -18,7 +18,6 @@
#include "os.h"
#include "user.h"
#include "kern_util.h"
-#include "user_util.h"
static void copy_stat(struct uml_stat *dst, struct stat64 *src)
{
@@ -291,54 +290,22 @@ 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 os_read_file(int fd, 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));
+ int n = read(fd, buf, len);
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_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 n = write(fd, (void *) buf, len);
+
+ if(n < 0)
+ return -errno;
+ return n;
}
int os_file_size(char *file, unsigned long long *size_out)