From 0eb5085c38749f2a91e5bd8cbebb1ebf3398343c Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Thu, 16 Nov 2023 14:36:38 +0100 Subject: arch: remove ARCH_TASK_STRUCT_ON_STACK IA-64 was the only architecture which selected ARCH_TASK_STRUCT_ON_STACK. IA-64 was removed with commit cf8e8658100d ("arch: Remove Itanium (IA-64) architecture"). Therefore remove support for ARCH_TASK_STRUCT_ON_STACK as well. Note: this also reveals a potential bug in powerpc code, which makes use of __init_task_data without selecting ARCH_TASK_STRUCT_ON_STACK which makes __init_task_data a no-op. This is broken since commit d11ed3ab3166 ("Expand INIT_TASK() in init/init_task.c and remove") from 2018 and needs to be addressed separately. Link: https://lkml.kernel.org/r/20231116133638.1636277-4-hca@linux.ibm.com Signed-off-by: Heiko Carstens Reviewed-by: Arnd Bergmann Cc: Michael Ellerman Cc: Nicholas Piggin Signed-off-by: Andrew Morton --- init/init_task.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) (limited to 'init') diff --git a/init/init_task.c b/init/init_task.c index 5727d42149c3..6f6485d554df 100644 --- a/init/init_task.c +++ b/init/init_task.c @@ -51,8 +51,7 @@ static struct sighand_struct init_sighand = { }; #ifdef CONFIG_SHADOW_CALL_STACK -unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] - __init_task_data = { +unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] = { [(SCS_SIZE / sizeof(long)) - 1] = SCS_END_MAGIC }; #endif @@ -61,12 +60,7 @@ unsigned long init_shadow_call_stack[SCS_SIZE / sizeof(long)] * Set up the first task table, touch at your own risk!. Base=0, * limit=0x1fffff (=2MB) */ -struct task_struct init_task -#ifdef CONFIG_ARCH_TASK_STRUCT_ON_STACK - __init_task_data -#endif - __aligned(L1_CACHE_BYTES) -= { +struct task_struct init_task __aligned(L1_CACHE_BYTES) = { #ifdef CONFIG_THREAD_INFO_IN_TASK .thread_info = INIT_THREAD_INFO(init_task), .stack_refcount = REFCOUNT_INIT(1), -- cgit v1.2.3-58-ga151