From: Andi Kleen <andi@firstfloor.org>
To: Glauber Costa <gcosta@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>,
linux-kernel@vger.kernel.org, tglx@linutronix.de, mingo@elte.hu,
x86@kernel.org
Subject: Re: [PATCH 17/39] clobber rbx in putuser_64.S
Date: Tue, 1 Jul 2008 01:45:04 +0200 [thread overview]
Message-ID: <20080630234504.GA3029@one.firstfloor.org> (raw)
In-Reply-To: <4869497B.5040100@redhat.com>
> But for this case, I think we can come up with a macro that selects the
> appropriate register for each of them. Should be easy to do now that the
> code is merged.
Note that each get_user() backend is ~10 lines or so. If you add
that many macros you might end up with more code than if you
just keep them separate.
While I admit I am also partly to blame for some asm macro
mess, e.g. in entry.S, I relented and would now advocate
to minimize macro use in assembler. It simply makes it much
harder to understand and to change.
-Andi
next prev parent reply other threads:[~2008-06-30 23:33 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-27 21:34 [PATCH 0/39] Merge files at x86/lib Glauber Costa
2008-06-27 21:34 ` [PATCH 01/39] Don't use size specifiers Glauber Costa
2008-06-27 21:34 ` [PATCH 02/39] provide delay loop for x86_64 Glauber Costa
2008-06-27 21:34 ` [PATCH 03/39] use rdtscll in read_current_timer for i386 Glauber Costa
2008-06-27 21:34 ` [PATCH 04/39] explicitly use edx in const delay function Glauber Costa
2008-06-27 21:34 ` [PATCH 05/39] integrate delay functions Glauber Costa
2008-06-27 21:34 ` [PATCH 06/39] use something common for both architectures Glauber Costa
2008-06-27 21:34 ` [PATCH 07/39] don't clobber r8 nor use rcx Glauber Costa
2008-06-27 21:34 ` [PATCH 08/39] don't use word-size specifiers Glauber Costa
2008-06-27 21:34 ` [PATCH 09/39] adapt x86_64 getuser functions Glauber Costa
2008-06-27 21:34 ` [PATCH 10/39] rename threadinfo to TI Glauber Costa
2008-06-27 21:34 ` [PATCH 11/39] Don't use word-size specifiers on getuser_64 Glauber Costa
2008-06-27 21:34 ` [PATCH 12/39] introduce __ASM_REG macro Glauber Costa
2008-06-27 21:34 ` [PATCH 13/39] use _ASM_PTR instead of explicit word-size pointers Glauber Costa
2008-06-27 21:34 ` [PATCH 14/39] merge getuser asm functions Glauber Costa
2008-06-27 21:34 ` [PATCH 15/39] don't save ebx in putuser_32.S Glauber Costa
2008-06-27 21:34 ` [PATCH 16/39] user put_user_x instead of all variants Glauber Costa
2008-06-27 21:34 ` [PATCH 17/39] clobber rbx in putuser_64.S Glauber Costa
2008-06-27 21:34 ` [PATCH 18/39] pass argument to putuser_64 functions in ax register Glauber Costa
2008-06-27 21:34 ` [PATCH 19/39] change testing logic in putuser_64.S Glauber Costa
2008-06-27 21:34 ` [PATCH 20/39] replace function headers by macros Glauber Costa
2008-06-27 21:34 ` [PATCH 21/39] don't use word-size specifiers in putuser files Glauber Costa
2008-06-27 21:34 ` [PATCH 22/39] use macros from asm.h Glauber Costa
2008-06-27 21:34 ` [PATCH 23/39] merge putuser asm functions Glauber Costa
2008-06-27 21:34 ` [PATCH 24/39] commonize __range_not_ok Glauber Costa
2008-06-27 21:34 ` [PATCH 25/39] merge common parts of uaccess Glauber Costa
2008-06-27 21:34 ` [PATCH 26/39] merge getuser Glauber Costa
2008-06-27 21:34 ` [PATCH 27/39] move __addr_ok to uaccess.h Glauber Costa
2008-06-27 21:34 ` [PATCH 28/39] use k modifier for 4-byte access Glauber Costa
2008-06-27 21:34 ` [PATCH 29/39] mark x86_64 as having a working WP Glauber Costa
2008-06-27 21:34 ` [PATCH 30/39] don't always use EFAULT on __put_user_size Glauber Costa
2008-06-27 21:34 ` [PATCH 31/39] merge __put_user_asm and its user Glauber Costa
2008-06-27 21:34 ` [PATCH 32/39] don't always use EFAULT on __get_user_size Glauber Costa
2008-06-27 21:34 ` [PATCH 33/39] merge __get_user_asm and its users Glauber Costa
2008-06-27 21:34 ` [PATCH 34/39] Be more explicit in __put_user_x Glauber Costa
2008-06-27 21:34 ` [PATCH 35/39] turn __put_user_check directly into put_user Glauber Costa
2008-06-27 21:34 ` [PATCH 36/39] merge put_user Glauber Costa
2008-06-27 21:34 ` [PATCH 37/39] move __get_user and __put_user into uaccess.h Glauber Costa
2008-06-27 21:34 ` [PATCH 38/39] put movsl_mask " Glauber Costa
2008-06-27 21:34 ` [PATCH 39/39] define architectural characteristics in uaccess.h Glauber Costa
2008-06-30 6:30 ` [PATCH 25/39] merge common parts of uaccess Ingo Molnar
2008-06-30 6:31 ` Ingo Molnar
2008-06-30 16:31 ` H. Peter Anvin
2008-06-30 18:48 ` Glauber Costa
2008-06-30 18:53 ` Ingo Molnar
2008-06-30 19:00 ` Glauber Costa
2008-06-30 19:29 ` Ingo Molnar
2008-06-28 12:12 ` [PATCH 17/39] clobber rbx in putuser_64.S Andi Kleen
2008-06-30 21:00 ` Glauber Costa
2008-06-30 23:45 ` Andi Kleen [this message]
2008-07-01 2:46 ` Glauber Costa
2008-07-01 15:11 ` Glauber Costa
2008-06-30 21:40 ` Glauber Costa
2008-06-28 12:10 ` [PATCH 15/39] don't save ebx in putuser_32.S Andi Kleen
2008-06-30 20:43 ` Glauber Costa
2008-06-28 12:09 ` [PATCH 12/39] introduce __ASM_REG macro Andi Kleen
2008-06-27 23:17 ` [PATCH 08/39] don't use word-size specifiers H. Peter Anvin
2008-06-27 23:22 ` H. Peter Anvin
2008-06-28 1:41 ` Glauber Costa
2008-06-28 5:09 ` H. Peter Anvin
2008-06-30 5:10 ` [PATCH 0/39] Merge files at x86/lib H. Peter Anvin
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