From: Frederic Weisbecker <frederic@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
x86@kernel.org, Steven Rostedt <rostedt@goodmis.org>,
Brian Gerst <brgerst@gmail.com>, Juergen Gross <jgross@suse.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Arnd Bergmann <arnd@arndb.de>
Subject: Re: [patch 02/24] x86/entry/64: Avoid pointless code when CONTEXT_TRACKING=n
Date: Mon, 2 Mar 2020 23:25:01 +0100 [thread overview]
Message-ID: <20200302222500.GA25705@lenoir> (raw)
In-Reply-To: <20200225222648.395059616@linutronix.de>
On Tue, Feb 25, 2020 at 11:16:08PM +0100, Thomas Gleixner wrote:
> GAS cannot optimize out the test and conditional jump when context tracking
> is disabled and CALL_enter_from_user_mode is an empty macro.
>
> Wrap it in #ifdeffery. Will go away once all this is moved to C.
>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
next prev parent reply other threads:[~2020-03-02 22:25 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-25 22:16 [patch 00/24] x86/entry: Consolidation - Part III Thomas Gleixner
2020-02-25 22:16 ` [patch 01/24] x86/traps: Split trap numbers out in a seperate header Thomas Gleixner
2020-02-26 5:52 ` Andy Lutomirski
2020-02-28 9:39 ` Alexandre Chartre
2020-02-25 22:16 ` [patch 02/24] x86/entry/64: Avoid pointless code when CONTEXT_TRACKING=n Thomas Gleixner
2020-02-26 5:52 ` Andy Lutomirski
2020-02-28 9:40 ` Alexandre Chartre
2020-03-02 22:25 ` Frederic Weisbecker [this message]
2020-02-25 22:16 ` [patch 03/24] x86/entry/64: Reorder idtentries Thomas Gleixner
2020-02-26 5:53 ` Andy Lutomirski
2020-02-28 9:40 ` Alexandre Chartre
2020-02-25 22:16 ` [patch 04/24] x86/entry: Distangle idtentry Thomas Gleixner
2020-02-28 10:27 ` Alexandre Chartre
2020-02-25 22:16 ` [patch 05/24] x86/entry/32: Provide macro to emit IDT entry stubs Thomas Gleixner
2020-02-28 10:33 ` Alexandre Chartre
2020-02-25 22:16 ` [patch 06/24] x86/idtentry: Provide macros to define/declare IDT entry points Thomas Gleixner
2020-02-28 10:42 ` Alexandre Chartre
2020-03-04 12:46 ` Thomas Gleixner
2020-02-25 22:16 ` [patch 07/24] x86/traps: Prepare for using DEFINE_IDTENTRY Thomas Gleixner
2020-02-28 14:13 ` Alexandre Chartre
2020-02-28 14:18 ` Thomas Gleixner
2020-02-25 22:16 ` [patch 08/24] x86/entry: Convert Divide Error to IDTENTRY Thomas Gleixner
2020-02-28 14:58 ` Alexandre Chartre
2020-03-04 13:09 ` Thomas Gleixner
2020-02-25 22:16 ` [patch 09/24] x86/entry: Convert Overflow exception " Thomas Gleixner
2020-02-25 22:16 ` [patch 10/24] x86/entry: Convert INT3 " Thomas Gleixner
2020-02-25 22:16 ` [patch 11/24] x86/entry: Convert Bounds " Thomas Gleixner
2020-02-25 22:16 ` [patch 12/24] x86/entry: Convert Invalid Opcode " Thomas Gleixner
2020-02-25 22:16 ` [patch 13/24] x86/entry: Convert Device not available " Thomas Gleixner
2020-02-25 22:16 ` [patch 14/24] x86/entry: Convert Coprocessor segment overrun " Thomas Gleixner
2020-02-25 22:16 ` [patch 15/24] x86/entry: Provide IDTENTRY_ERRORCODE Thomas Gleixner
2020-02-25 22:16 ` [patch 16/24] x86/entry: Convert Invalid TSS exception to IDTENTRY Thomas Gleixner
2020-02-25 22:16 ` [patch 17/24] x86/entry: Convert Segment not present " Thomas Gleixner
2020-02-25 22:16 ` [patch 18/24] x86/entry: Convert Stack segment " Thomas Gleixner
2020-02-25 22:16 ` [patch 19/24] x86/entry: Convert General protection " Thomas Gleixner
2020-02-25 22:16 ` [patch 20/24] x86/entry: Convert Spurious interrupt bug " Thomas Gleixner
2020-02-25 22:16 ` [patch 21/24] x86/entry: Convert Coprocessor error " Thomas Gleixner
2020-02-25 22:16 ` [patch 22/24] x86/entry: Convert Alignment check " Thomas Gleixner
2020-02-25 22:16 ` [patch 23/24] x86/entry: Convert SIMD coprocessor error " Thomas Gleixner
2020-02-25 22:16 ` [patch 24/24] x86/entry/32: Convert IRET exception to IDTENTRY_SW Thomas Gleixner
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