The patch titled
Subject: arch: remove ARCH_THREAD_STACK_ALLOCATOR
has been added to the -mm mm-nonmm-unstable branch. Its filename is
arch-remove-arch_thread_stack_allocator.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/arch-remove-arch_thread_stack_allocator.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Heiko Carstens <hca@xxxxxxxxxxxxx>
Subject: arch: remove ARCH_THREAD_STACK_ALLOCATOR
Date: Thu, 16 Nov 2023 14:36:36 +0100
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 cf8e8658100d ("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@xxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20231116133638.1636277-2-hca@xxxxxxxxxxxxx
Signed-off-by: Heiko Carstens <hca@xxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/Kconfig | 4 ----
kernel/fork.c | 20 --------------------
2 files changed, 24 deletions(-)
--- a/arch/Kconfig~arch-remove-arch_thread_stack_allocator
+++ a/arch/Kconfig
@@ -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
--- a/kernel/fork.c~arch-remove-arch_thread_stack_allocator
+++ a/kernel/fork.c
@@ -179,8 +179,6 @@ static inline void free_task_struct(stru
}
#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;
_
Patches currently in -mm which might be from hca@xxxxxxxxxxxxx are
arch-remove-arch_thread_stack_allocator.patch
arch-remove-arch_task_struct_allocator.patch
arch-remove-arch_task_struct_on_stack.patch
