Re: [PATCH v4 0/3] m68k: Improved switch stack handling

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Subject: Re: [PATCH v4 0/3] m68k: Improved switch stack handling
From: Michael Schmitz <schmitzmic@xxxxxxxxx>
Date: Mon, 19 Jul 2021 07:47:19 +1200
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>, geert@xxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-m68k@xxxxxxxxxxxxxxx, torvalds@xxxxxxxxxxxxxxxxxxxx
In-reply-to: <87a6mj99vf.fsf@igel.home>
References: <1624407696-20180-1-git-send-email-schmitzmic@gmail.com> <87zgunzovm.fsf@disp2133> <3b4f287b-7be2-0e7b-ae5a-6c11972601fb@gmail.com> <1b656c02-925c-c4ba-03d3-f56075cdfac5@gmail.com> <8735scvklk.fsf@disp2133> <e9009e13-cfec-c494-0b3b-f334f75cd1e4@gmail.com> <af434994-5c61-0e3a-c7bc-3ed966ccb44f@gmail.com> <87a6mj99vf.fsf@igel.home>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0

Hi Andreas,

On 18/07/21 10:47 pm, Andreas Schwab wrote:

On Jul 18 2021, Michael Schmitz wrote:

+	addql   #8,%sp
+	addql   #8,%sp
+	addql   #8,%sp
+	addql   #8,%sp
+	addql   #8,%sp
+	addql   #4,%sp

aka     lea     44(%sp),%sp


Thanks - I knew there should be a better way.

Somewhere in entry.S is

addql   #8,%sp
addql   #4,%sp

- is that faster than

lea     12(%sp),%sp ?

Cheers,

	Michael

Follow-Ups:
- Re: [PATCH v4 0/3] m68k: Improved switch stack handling
  - From: Brad Boyer

References:
- [PATCH v4 0/3] m68k: Improved switch stack handling
  - From: Michael Schmitz
- Re: [PATCH v4 0/3] m68k: Improved switch stack handling
  - From: Eric W. Biederman
- Re: [PATCH v4 0/3] m68k: Improved switch stack handling
  - From: Michael Schmitz
- Re: [PATCH v4 0/3] m68k: Improved switch stack handling
  - From: Michael Schmitz
- Re: [PATCH v4 0/3] m68k: Improved switch stack handling
  - From: Eric W. Biederman
- Re: [PATCH v4 0/3] m68k: Improved switch stack handling
  - From: Michael Schmitz
- Re: [PATCH v4 0/3] m68k: Improved switch stack handling
  - From: Michael Schmitz
- Re: [PATCH v4 0/3] m68k: Improved switch stack handling
  - From: Andreas Schwab

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