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authorArnd Bergmann <arnd@arndb.de>2018-07-13 12:52:28 +0200
committerArnd Bergmann <arnd@arndb.de>2018-08-27 14:48:48 +0200
commit9afc5eee65ca7d717a99d6fe8f4adfe32a40940a (patch)
tree4e5585234e71076c0a5a470b157e0b9de96b8da6 /net/compat.c
parent33e26418193f58d1895f2f968e1953b1caf8deb7 (diff)
downloadlinux-stericsson-9afc5eee65ca7d717a99d6fe8f4adfe32a40940a.tar.gz
y2038: globally rename compat_time to old_time32
Christoph Hellwig suggested a slightly different path for handling backwards compatibility with the 32-bit time_t based system calls: Rather than simply reusing the compat_sys_* entry points on 32-bit architectures unchanged, we get rid of those entry points and the compat_time types by renaming them to something that makes more sense on 32-bit architectures (which don't have a compat mode otherwise), and then share the entry points under the new name with the 64-bit architectures that use them for implementing the compatibility. The following types and interfaces are renamed here, and moved from linux/compat_time.h to linux/time32.h: old new --- --- compat_time_t old_time32_t struct compat_timeval struct old_timeval32 struct compat_timespec struct old_timespec32 struct compat_itimerspec struct old_itimerspec32 ns_to_compat_timeval() ns_to_old_timeval32() get_compat_itimerspec64() get_old_itimerspec32() put_compat_itimerspec64() put_old_itimerspec32() compat_get_timespec64() get_old_timespec32() compat_put_timespec64() put_old_timespec32() As we already have aliases in place, this patch addresses only the instances that are relevant to the system call interface in particular, not those that occur in device drivers and other modules. Those will get handled separately, while providing the 64-bit version of the respective interfaces. I'm not renaming the timex, rusage and itimerval structures, as we are still debating what the new interface will look like, and whether we will need a replacement at all. This also doesn't change the names of the syscall entry points, which can be done more easily when we actually switch over the 32-bit architectures to use them, at that point we need to change COMPAT_SYSCALL_DEFINEx to SYSCALL_DEFINEx with a new name, e.g. with a _time32 suffix. Suggested-by: Christoph Hellwig <hch@infradead.org> Link: https://lore.kernel.org/lkml/20180705222110.GA5698@infradead.org/ Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'net/compat.c')
-rw-r--r--net/compat.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/compat.c b/net/compat.c
index 3b2105f6549d..2ef160876bc1 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -812,7 +812,7 @@ COMPAT_SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, buf, compat_size_t, len
static int __compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
unsigned int vlen, unsigned int flags,
- struct compat_timespec __user *timeout)
+ struct old_timespec32 __user *timeout)
{
int datagrams;
struct timespec ktspec;
@@ -834,7 +834,7 @@ static int __compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
COMPAT_SYSCALL_DEFINE5(recvmmsg, int, fd, struct compat_mmsghdr __user *, mmsg,
unsigned int, vlen, unsigned int, flags,
- struct compat_timespec __user *, timeout)
+ struct old_timespec32 __user *, timeout)
{
return __compat_sys_recvmmsg(fd, mmsg, vlen, flags, timeout);
}