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Subject: Re: [patch V4 part 1 10/36] x86/entry: Remove the unused
 LOCKDEP_SYSEXIT cruft
To:     Thomas Gleixner <tglx@linutronix.de>,
        LKML <linux-kernel@vger.kernel.org>
Cc:     x86@kernel.org, "Paul E. McKenney" <paulmck@kernel.org>,
        Andy Lutomirski <luto@kernel.org>,
        Frederic Weisbecker <frederic@kernel.org>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Sean Christopherson <sean.j.christopherson@intel.com>,
        Masami Hiramatsu <mhiramat@kernel.org>,
        Petr Mladek <pmladek@suse.com>,
        Steven Rostedt <rostedt@goodmis.org>,
        Joel Fernandes <joel@joelfernandes.org>,
        Boris Ostrovsky <boris.ostrovsky@oracle.com>,
        Juergen Gross <jgross@suse.com>,
        Brian Gerst <brgerst@gmail.com>,
        Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Will Deacon <will@kernel.org>
References: <20200505131602.633487962@linutronix.de>
 <20200505134059.061301403@linutronix.de>
From:   Alexandre Chartre <alexandre.chartre@oracle.com>
Message-ID: <e8f30d35-ab13-1050-a33c-d2bc76977b5a@oracle.com>
Date:   Wed, 6 May 2020 15:52:19 +0200
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On 5/5/20 3:16 PM, Thomas Gleixner wrote:
> No users left since two years due to commit 21d375b6b34f ("x86/entry/64:
> Remove the SYSCALL64 fast path")
> 
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> ---
>   arch/x86/entry/thunk_64.S       |    5 -----
>   arch/x86/include/asm/irqflags.h |   24 ------------------------
>   2 files changed, 29 deletions(-)

Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>

alex.

> --- a/arch/x86/entry/thunk_64.S
> +++ b/arch/x86/entry/thunk_64.S
> @@ -42,10 +42,6 @@ SYM_FUNC_END(\name)
>   	THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1
>   #endif
>   
> -#ifdef CONFIG_DEBUG_LOCK_ALLOC
> -	THUNK lockdep_sys_exit_thunk,lockdep_sys_exit
> -#endif
> -
>   #ifdef CONFIG_PREEMPTION
>   	THUNK preempt_schedule_thunk, preempt_schedule
>   	THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
> @@ -54,7 +50,6 @@ SYM_FUNC_END(\name)
>   #endif
>   
>   #if defined(CONFIG_TRACE_IRQFLAGS) \
> - || defined(CONFIG_DEBUG_LOCK_ALLOC) \
>    || defined(CONFIG_PREEMPTION)
>   SYM_CODE_START_LOCAL_NOALIGN(.L_restore)
>   	popq %r11
> --- a/arch/x86/include/asm/irqflags.h
> +++ b/arch/x86/include/asm/irqflags.h
> @@ -180,30 +180,6 @@ static inline int arch_irqs_disabled(voi
>   #  define TRACE_IRQS_ON
>   #  define TRACE_IRQS_OFF
>   #endif
> -#ifdef CONFIG_DEBUG_LOCK_ALLOC
> -#  ifdef CONFIG_X86_64
> -#    define LOCKDEP_SYS_EXIT		call lockdep_sys_exit_thunk
> -#    define LOCKDEP_SYS_EXIT_IRQ \
> -	TRACE_IRQS_ON; \
> -	sti; \
> -	call lockdep_sys_exit_thunk; \
> -	cli; \
> -	TRACE_IRQS_OFF;
> -#  else
> -#    define LOCKDEP_SYS_EXIT \
> -	pushl %eax;				\
> -	pushl %ecx;				\
> -	pushl %edx;				\
> -	call lockdep_sys_exit;			\
> -	popl %edx;				\
> -	popl %ecx;				\
> -	popl %eax;
> -#    define LOCKDEP_SYS_EXIT_IRQ
> -#  endif
> -#else
> -#  define LOCKDEP_SYS_EXIT
> -#  define LOCKDEP_SYS_EXIT_IRQ
> -#endif
>   #endif /* __ASSEMBLY__ */
>   
>   #endif
>