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fork, IA64: Provide alloc_thread_stack_node() for IA64

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Provide a generic alloc_thread_stack_node() for IA64 and
CONFIG_ARCH_THREAD_STACK_ALLOCATOR which returns stack pointer and sets
task_struct::stack so it behaves exactly like the other implementations.

Rename IA64's alloc_thread_stack_node() and add the generic version to the
fork code so it is in one place _and_ to drastically lower the chances of
fat fingering the IA64 code.  Do the same for free_thread_stack().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220217102406.3697941-4-bigeasy@linutronix.de
This commit is contained in:
Sebastian Andrzej Siewior
2022-02-17 11:24:01 +01:00
committed by Thomas Gleixner
parent 546c42b2c5
commit 2bb0529c0b
2 changed files with 20 additions and 3 deletions
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17
kernel/fork.c
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@@ -330,6 +330,23 @@ void thread_stack_cache_init(void)
}
# endif /* THREAD_SIZE >= PAGE_SIZE || defined(CONFIG_VMAP_STACK) */
#else /* CONFIG_ARCH_THREAD_STACK_ALLOCATOR */
static unsigned long *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;
}
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) */