linux-kernel - [PATCH RFC v2 01/28] ARM: Prepare includes for generic entry

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Message-Id: <20241029-arm-generic-entry-v2-1-573519abef38@linaro.org>
Date: Tue, 29 Oct 2024 11:52:41 +0100
From: Linus Walleij <linus.walleij@...aro.org>
To: Oleg Nesterov <oleg@...hat.com>, Russell King <linux@...linux.org.uk>, 
 Kees Cook <kees@...nel.org>, Andy Lutomirski <luto@...capital.net>, 
 Will Drewry <wad@...omium.org>, Frederic Weisbecker <frederic@...nel.org>, 
 "Paul E. McKenney" <paulmck@...nel.org>, 
 Jinjie Ruan <ruanjinjie@...wei.com>, Arnd Bergmann <arnd@...db.de>, 
 Ard Biesheuvel <ardb@...nel.org>, Al Viro <viro@...iv.linux.org.uk>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH RFC v2 01/28] ARM: Prepare includes for generic entry

The generic entry code needs a static inline function for
regs_irq_disabled() so add this, in further requires the signature
of on_thread_stack() to be __always_inline so add this as
well.

Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
---
 arch/arm/include/asm/ptrace.h     | 5 +++++
 arch/arm/include/asm/stacktrace.h | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h
index 6eb311fb2da0..a01c66f0ad90 100644
--- a/arch/arm/include/asm/ptrace.h
+++ b/arch/arm/include/asm/ptrace.h
@@ -52,6 +52,11 @@ struct svc_pt_regs {
 #define fast_interrupts_enabled(regs) \
 	(!((regs)->ARM_cpsr & PSR_F_BIT))

+static inline int regs_irqs_disabled(struct pt_regs *regs)
+{
+	return !interrupts_enabled(regs);
+}
+
 /* Are the current registers suitable for user mode?
  * (used to maintain security in signal handlers)
  */
diff --git a/arch/arm/include/asm/stacktrace.h b/arch/arm/include/asm/stacktrace.h
index f80a85b091d6..815b5f256af1 100644
--- a/arch/arm/include/asm/stacktrace.h
+++ b/arch/arm/include/asm/stacktrace.h
@@ -26,7 +26,7 @@ struct stackframe {
 #endif
 };

-static inline bool on_thread_stack(void)
+static __always_inline bool on_thread_stack(void)
 {
 	unsigned long delta = current_stack_pointer ^ (unsigned long)current->stack;

-- 
2.46.2