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y2038: utimes: Rework #ifdef guards for compat syscalls

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After changing over to 64-bit time_t syscalls, many architectures will
want compat_sys_utimensat() but not respective handlers for utime(),
utimes() and futimesat(). This adds a new __ARCH_WANT_SYS_UTIME32 to
complement __ARCH_WANT_SYS_UTIME. For now, all 64-bit architectures that
support CONFIG_COMPAT set it, but future 64-bit architectures will not
(tile would not have needed it either, but got removed).

As older 32-bit architectures get converted to using CONFIG_64BIT_TIME,
they will have to use __ARCH_WANT_SYS_UTIME32 instead of
__ARCH_WANT_SYS_UTIME. Architectures using the generic syscall ABI don't
need either of them as they never had a utime syscall.

Since the compat_utimbuf structure is now required outside of
CONFIG_COMPAT, I'm moving it into compat_time.h.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
changed from last version:
- renamed __ARCH_WANT_COMPAT_SYS_UTIME to __ARCH_WANT_SYS_UTIME32
This commit is contained in:
Arnd Bergmann 2018-04-17 12:03:19 +02:00
parent 185cfaf764
commit 4faea239e5
10 changed files with 19 additions and 8 deletions
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7
include/linux/compat.h
View file

@ -113,11 +113,6 @@ typedef __compat_gid32_t compat_gid_t;
struct compat_sel_arg_struct;
struct rusage;
struct compat_utimbuf {
old_time32_t actime;
old_time32_t modtime;
};
struct compat_itimerval {
struct old_timeval32 it_interval;
struct old_timeval32 it_value;
@ -942,7 +937,7 @@ asmlinkage long compat_sys_newlstat(const char __user *filename,
/* __ARCH_WANT_SYSCALL_DEPRECATED */
asmlinkage long compat_sys_time(old_time32_t __user *tloc);
asmlinkage long compat_sys_utime(const char __user *filename,
struct compat_utimbuf __user *t);
struct old_utimbuf32 __user *t);
asmlinkage long compat_sys_futimesat(unsigned int dfd,
const char __user *filename,
struct old_timeval32 __user *t);