summaryrefslogtreecommitdiff
path: root/arch/um/include
diff options
context:
space:
mode:
authorArnd Bergmann <arnd@arndb.de>2019-11-05 09:39:51 +0100
committerArnd Bergmann <arnd@arndb.de>2019-12-18 18:07:31 +0100
commit853bc0ab341b0c99619f83f4060dedcccad77b2a (patch)
treece5ecd2529f48e2b4544b88bf06bc09debd0c4db /arch/um/include
parent37e86e0fd0403f51d6dd49abd1469361714f6ca4 (diff)
um: ubd: use 64-bit time_t where possible
The ubd code suffers from a possible y2038 overflow on 32-bit architectures, both for the cow header and the os_file_modtime() function. Replace time_t with time64_t to extend the ubd_kern side as much as possible. Whether this makes a difference for the user side depends on the host libc implementation that may use either 32-bit or 64-bit time_t. For the cow file format, the header contains an unsigned 32-bit timestamp, which is good until y2106, passing this through a 'long long' gives us a consistent interpretation between 32-bit and 64-bit um kernels. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/um/include')
-rw-r--r--arch/um/include/shared/os.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h
index 506bcd1bca68..0f30204b6afa 100644
--- a/arch/um/include/shared/os.h
+++ b/arch/um/include/shared/os.h
@@ -150,7 +150,7 @@ extern int os_sync_file(int fd);
extern int os_file_size(const char *file, unsigned long long *size_out);
extern int os_pread_file(int fd, void *buf, int len, unsigned long long offset);
extern int os_pwrite_file(int fd, const void *buf, int count, unsigned long long offset);
-extern int os_file_modtime(const char *file, unsigned long *modtime);
+extern int os_file_modtime(const char *file, long long *modtime);
extern int os_pipe(int *fd, int stream, int close_on_exec);
extern int os_set_fd_async(int fd);
extern int os_clear_fd_async(int fd);