linux-kernel - Re: [PATCH v2 2/5] entry: rename exit_from_user

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Date:   Tue, 01 Dec 2020 15:41:09 +0100
From:   Sven Schnelle <svens@...ux.ibm.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/5] entry: rename exit_from_user_mode()

Sven Schnelle <svens@...ux.ibm.com> writes:

> In order to make this function publicly available rename
> it so it can still be inlined. An additional exit_from_user_mode()
> function will be added with a later commit.

That should of course be exit_to_user_mode() in the commit
description...

> Signed-off-by: Sven Schnelle <svens@...ux.ibm.com>
> ---
>  kernel/entry/common.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/kernel/entry/common.c b/kernel/entry/common.c
> index 683a8e1b5388..076ee1cde67f 100644
> --- a/kernel/entry/common.c
> +++ b/kernel/entry/common.c
> @@ -111,7 +111,7 @@ noinstr void syscall_enter_from_user_mode_prepare(struct pt_regs *regs)
>  }
>  
>  /**
> - * exit_to_user_mode - Fixup state when exiting to user mode
> + * __exit_to_user_mode - Fixup state when exiting to user mode
>   *
>   * Syscall/interupt exit enables interrupts, but the kernel state is
>   * interrupts disabled when this is invoked. Also tell RCU about it.
> @@ -122,7 +122,7 @@ noinstr void syscall_enter_from_user_mode_prepare(struct pt_regs *regs)
>   *    mitigations, etc.
>   * 4) Tell lockdep that interrupts are enabled
>   */
> -static __always_inline void exit_to_user_mode(void)
> +static __always_inline void __exit_to_user_mode(void)
>  {
>  	instrumentation_begin();
>  	trace_hardirqs_on_prepare();
> @@ -265,7 +265,7 @@ __visible noinstr void syscall_exit_to_user_mode(struct pt_regs *regs)
>  	local_irq_disable_exit_to_user();
>  	exit_to_user_mode_prepare(regs);
>  	instrumentation_end();
> -	exit_to_user_mode();
> +	__exit_to_user_mode();
>  }
>  
>  noinstr void irqentry_enter_from_user_mode(struct pt_regs *regs)
> @@ -278,7 +278,7 @@ 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();
> +	__exit_to_user_mode();
>  }
>  
>  noinstr irqentry_state_t irqentry_enter(struct pt_regs *regs)