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arch: remove ARCH_THREAD_STACK_ALLOCATOR

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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 cf8e865810 ("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: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Heiko Carstens 2023-11-16 14:36:36 +01:00 committed by Andrew Morton
parent 2f0eff2054
commit f72709ab69
2 changed files with 0 additions and 24 deletions
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4
arch/Kconfig
View file

@ -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

20
kernel/fork.c
View file

@ -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;