We have several files on sparc that include linux/compat.h and expect
asm/compat.h not to be included, otherwise we get a build failure.

Since we need to include asm/compat.h for compat time_t handling
on all 32-bit architectures now, this hides some portions of
asm/compat.h in order to let the rest of the file get included.

Signed-off-by: Arnd Bergmann <a...@arndb.de>
 arch/sparc/include/asm/compat.h | 4 ++++
 1 file changed, 4 insertions(+)

This is the fix for the y2038 syscall series that missed the 4.17 merge
window. I've now spent two more days doing extra build testing on all
64-bit archtectures building with and without CONFIG_COMPAT, as well
as without CONFIG_64BIT. I did not run into any additional build failures
after this patch, so my plan is to pick that up into my y2038 tree after
-rc1 and send Thomas a pull request a few days later for inclusion
in linux-4.18.

diff --git a/arch/sparc/include/asm/compat.h b/arch/sparc/include/asm/compat.h
index 161aeacbc9ad..4eb51d2dae98 100644
--- a/arch/sparc/include/asm/compat.h
+++ b/arch/sparc/include/asm/compat.h
@@ -157,6 +157,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
        return (u32)(unsigned long)uptr;
 static inline void __user *arch_compat_alloc_user_space(long len)
        struct pt_regs *regs = current_thread_info()->kregs;
@@ -173,6 +174,7 @@ static inline void __user 
*arch_compat_alloc_user_space(long len)
        return (void __user *) usp;
 struct compat_ipc64_perm {
        compat_key_t key;
@@ -232,6 +234,7 @@ struct compat_shmid64_ds {
        unsigned int    __unused2;
 static inline int is_compat_task(void)
        return test_thread_flag(TIF_32BIT);
@@ -243,5 +246,6 @@ static inline bool in_compat_syscall(void)
        return pt_regs_trap_type(current_pt_regs()) == 0x110;
 #define in_compat_syscall in_compat_syscall
 #endif /* _ASM_SPARC64_COMPAT_H */

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