[PATCH v2] sched: remove unused __HAVE_THREAD_FUNCTIONS hook support

[David Disseldorp <ddiss@suse.de>]

__HAVE_THREAD_FUNCTIONS could be defined by architectures wishing to
provide their own task_thread_info(), task_stack_page(),
setup_thread_stack() and end_of_stack() hooks.

Commit cf8e8658100d ("arch: Remove Itanium (IA-64) architecture")
removed the last upstream consumer of __HAVE_THREAD_FUNCTIONS, so change
the remaining !CONFIG_THREAD_INFO_IN_TASK && !__HAVE_THREAD_FUNCTIONS
conditionals to only check for the former case.

Signed-off-by: David Disseldorp <ddiss@suse.de>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
---
Changes since v1:
- add Ard's rb tag
- send for linux-next inclusion

 include/linux/sched.h            | 2 +-
 include/linux/sched/task_stack.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index e6ee4258169a0..abf26f1e1447b 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1898,7 +1898,7 @@ extern unsigned long init_stack[THREAD_SIZE / sizeof(unsigned long)];
 
 #ifdef CONFIG_THREAD_INFO_IN_TASK
 # define task_thread_info(task)	(&(task)->thread_info)
-#elif !defined(__HAVE_THREAD_FUNCTIONS)
+#else
 # define task_thread_info(task)	((struct thread_info *)(task)->stack)
 #endif
 
diff --git a/include/linux/sched/task_stack.h b/include/linux/sched/task_stack.h
index bf10bdb487ddc..2e52cc421bce9 100644
--- a/include/linux/sched/task_stack.h
+++ b/include/linux/sched/task_stack.h
@@ -33,7 +33,7 @@ static __always_inline unsigned long *end_of_stack(const struct task_struct *tas
 #endif
 }
 
-#elif !defined(__HAVE_THREAD_FUNCTIONS)
+#else
 
 #define task_stack_page(task)	((void *)(task)->stack)
 
-- 
2.43.0