[PATCH 0/8] arm64: set VMAP_STACK by default
Breno Leitao
leitao at debian.org
Mon Jul 7 09:01:00 PDT 2025
Hi all,
This patchset select VMAP_STACK on arm64 by default, and cleans up the
code by removing all associated CONFIG_VMAP_STACK conditionals.
This is a suggestion from Will Deacon from another discussion[1].
With VMAP_STACK now always enabled on arm64, the code can be
significantly simplified, reducing complexity and potential for
misconfiguration.
Overview of Changes
* Remove all #ifdef CONFIG_VMAP_STACK and related runtime checks
throughout the architecture codebase.
* Replace runtime checks with build-time assertions where
appropriate.
Link: https://lore.kernel.org/all/aGfYL8eXjTA9puQr@willie-the-truck/ [1]
Signed-off-by: Breno Leitao <leitao at debian.org>
---
Breno Leitao (8):
arm64: Enable VMAP_STACK support
arm64: efi: Remove CONFIG_VMAP_STACK check
arm64: Remove CONFIG_VMAP_STACK conditionals from THREAD_SHIFT and THREAD_ALIGN
arm64: remove CONFIG_VMAP_STACK conditionals from irq stack setup
arm64: remove CONFIG_VMAP_STACK conditionals from traps overflow stack
arm64: remove CONFIG_VMAP_STACK checks from stacktrace overflow logic
arm64: remove CONFIG_VMAP_STACK checks from SDEI stack handling
arm64: remove CONFIG_VMAP_STACK checks from entry code
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/memory.h | 6 +-----
arch/arm64/include/asm/stacktrace.h | 6 +-----
arch/arm64/kernel/efi.c | 5 -----
arch/arm64/kernel/entry-common.c | 2 --
arch/arm64/kernel/entry.S | 6 ------
arch/arm64/kernel/irq.c | 13 -------------
arch/arm64/kernel/sdei.c | 8 ++------
arch/arm64/kernel/stacktrace.c | 4 +---
arch/arm64/kernel/traps.c | 3 ---
10 files changed, 6 insertions(+), 48 deletions(-)
---
base-commit: 9dd1757493416310a5e71146a08bc228869f8dae
change-id: 20250707-arm64_vmap-fa70ba3c9cfb
Best regards,
--
Breno Leitao <leitao at debian.org>
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