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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2022-02-17 11:24:01 +0100
committerThomas Gleixner <tglx@linutronix.de>2022-02-22 22:25:01 +0100
commit2bb0529c0bc0698f3baf3e88ffd61a18eef252a7 (patch)
tree6d14fd0972b9bd98fc5fd450839add3743bb49fb /kernel/fork.c
parent546c42b2c5c161619736dd730d3df709181999d0 (diff)
fork, IA64: Provide alloc_thread_stack_node() for IA64
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
Diffstat (limited to 'kernel/fork.c')
-rw-r--r--kernel/fork.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 30c01ce2ae57..7b70c4741072 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -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) */