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entry: Inline irqentry_enter/exit_from/to_user_mode()

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There is no point to have this as a function which just inlines
enter_from_user_mode(). The function call overhead is larger than the
function itself.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://patch.msgid.link/20251027084306.715309918@linutronix.de
This commit is contained in:
Thomas Gleixner
2025-10-27 09:44:40 +01:00
committed by Ingo Molnar
parent 54a5ab5624
commit 7702a9c285
2 changed files with 11 additions and 15 deletions
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13
include/linux/irq-entry-common.h
View File

@@ -278,7 +278,10 @@ static __always_inline void exit_to_user_mode(void)
*
* The function establishes state (lockdep, RCU (context tracking), tracing)
*/
void irqentry_enter_from_user_mode(struct pt_regs *regs);
static __always_inline void irqentry_enter_from_user_mode(struct pt_regs *regs)
{
enter_from_user_mode(regs);
}
/**
* irqentry_exit_to_user_mode - Interrupt exit work
@@ -293,7 +296,13 @@ void irqentry_enter_from_user_mode(struct pt_regs *regs);
* Interrupt exit is not invoking #1 which is the syscall specific one time
* work.
*/
void irqentry_exit_to_user_mode(struct pt_regs *regs);
static __always_inline void irqentry_exit_to_user_mode(struct pt_regs *regs)
{
instrumentation_begin();
exit_to_user_mode_prepare(regs);
instrumentation_end();
exit_to_user_mode();
}
#ifndef irqentry_state
/**

13
kernel/entry/common.c
View File

@@ -62,19 +62,6 @@ __always_inline unsigned long exit_to_user_mode_loop(struct pt_regs *regs,
return ti_work;
}
noinstr void irqentry_enter_from_user_mode(struct pt_regs *regs)
{
enter_from_user_mode(regs);
}
noinstr void irqentry_exit_to_user_mode(struct pt_regs *regs)
{
instrumentation_begin();
exit_to_user_mode_prepare(regs);
instrumentation_end();
exit_to_user_mode();
}
noinstr irqentry_state_t irqentry_enter(struct pt_regs *regs)
{
irqentry_state_t ret = {