Commit f72709ab authored by Heiko Carstens's avatar Heiko Carstens Committed by Andrew Morton
Browse files

arch: remove ARCH_THREAD_STACK_ALLOCATOR 

Patch series "Remove unused code after IA-64 removal".

While looking into something different I noticed that there are a couple
of Kconfig options which were only selected by IA-64 and which are now
unused.

So remove them and simplify the code a bit.


This patch (of 3):

IA-64 was the only architecture which selected ARCH_THREAD_STACK_ALLOCATOR.
IA-64 was removed with commit cf8e8658 ("arch: Remove Itanium (IA-64)
architecture"). Therefore remove support for ARCH_THREAD_STACK_ALLOCATOR as
well.

Link: https://lkml.kernel.org/r/20231116133638.1636277-1-hca@linux.ibm.com
Link: https://lkml.kernel.org/r/20231116133638.1636277-2-hca@linux.ibm.com


Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Reviewed-by: default avatarArnd Bergmann <arnd@arndb.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 2f0eff20

arch/Kconfig

+0 −4
Original line number Diff line number Diff line
@@ -320,10 +320,6 @@ config HAVE_ARCH_THREAD_STRUCT_WHITELIST 
	  should be implemented. Without this, the entire thread_struct

	  field in task_struct will be left whitelisted.



# Select if arch has its private alloc_thread_stack() function

config ARCH_THREAD_STACK_ALLOCATOR

	bool



# Select if arch wants to size task_struct dynamically via arch_task_struct_size:

config ARCH_WANTS_DYNAMIC_TASK_STRUCT

	bool

kernel/fork.c

+0 −20
Original line number Diff line number Diff line
@@ -179,8 +179,6 @@ static inline void free_task_struct(struct task_struct *tsk) 
}

#endif



#ifndef CONFIG_ARCH_THREAD_STACK_ALLOCATOR



/*

 * Allocate pages if THREAD_SIZE is >= PAGE_SIZE, otherwise use a

 * kmemcache based allocator.
@@ -412,24 +410,6 @@ void thread_stack_cache_init(void) 
}



# endif /* THREAD_SIZE >= PAGE_SIZE || defined(CONFIG_VMAP_STACK) */

#else /* CONFIG_ARCH_THREAD_STACK_ALLOCATOR */



static int alloc_thread_stack_node(struct task_struct *tsk, int node)

{

	unsigned long *stack;



	stack = arch_alloc_thread_stack_node(tsk, node);

	tsk->stack = stack;

	return stack ? 0 : -ENOMEM;

}



static void free_thread_stack(struct task_struct *tsk)

{

	arch_free_thread_stack(tsk);

	tsk->stack = NULL;

}



#endif /* !CONFIG_ARCH_THREAD_STACK_ALLOCATOR */



/* SLAB cache for signal_struct structures (tsk->signal) */

static struct kmem_cache *signal_cachep;