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From: "George Spelvin" <linux@horizon.com>
To: linux-kernel@vger.kernel.org
Cc: alistair.francis@xilinx.com, bfields@fieldses.org,
	geert@linux-m68k.org, gerg@linux-m68k.org,
	linux-m68k@vger.kernel.org, michal.simek@xilinx.com,
	phdm@macq.eu, schwab@linux-m68k.org,
	uclinux-h8-devel@lists.sourceforge.jp,
	ysato@users.sourceforge.jp
Subject: [PATCH v2 00/10] String hash improvements
Date: 26 May 2016 13:09:58 -0400	[thread overview]
Message-ID: <20160526170958.23840.qmail@ns.sciencehorizons.net> (raw)
In-Reply-To: <20160525072027.5107.qmail@ns.sciencehorizons.net>

This is just the arch-specific part, updated as per requests.

* Fix the stupidly overcomplex m68k conditionals (per Geert Uytterhoeven)
* Renamed the arch file to <asm/hash.h> (per Geert Uytterhoeven)
* Improved the comments on the progress of shift-and-add (Philippe De Muyter)
* Added a self-test (per Michal Simek)

Things I did *not* do, because I thought the concerns were withdrawn
after discussion:  (If I misintrepreted silence, please correct me!)

* Use unconditional inclusion with an <asm-generic/hash.h> fallback.
* Change the multi-line asm() formatting (Philippe De Muyter)
* Move reference about algorithm credit (Philippe De Muyter)

The big change is the addition of a self-test in lib/test_hash.c.
That had to be written and the various tests validated by introducing
deliberate bugs into <arch/hash.h>.

Handling the fact that architectures are allowed to change the computed
function (even though none of the ones written so far have used that
freedom) added some complexity.  I ended up using the value of the
HAVE_ARCH_* macro.  If it's 1, that means it's expected to be a clone
of the generic versions, and it's compared against them.  If it's 0,
it's its own magic thing.

The big question is, should these go through the arch trees, or may I
just include them in the series to Linus?  The latter is simpler for me,
but obviously not okay without permission.

  parent reply	other threads:[~2016-05-27 14:57 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CA+55aFxPSW+84KfQ1N_WmND-wtvgj2zQm8nFPkRcc+gyU=uing@mail.gmail.com>
2016-05-25  7:20 ` [PATCH 00/10] String hash improvements George Spelvin
2016-05-25  8:00   ` Geert Uytterhoeven
2016-05-25  8:11     ` George Spelvin
2016-05-25  8:50       ` Geert Uytterhoeven
2016-05-25  9:07         ` George Spelvin
2016-05-25 16:08   ` Linus Torvalds
2016-05-28 19:57     ` [PATCH v3 " George Spelvin
2016-05-28 19:57       ` [PATCH v3 01/10] Pull out string hash to <linux/stringhash.h> George Spelvin
2016-05-28 19:57       ` [PATCH v3 02/10] fs/namei.c: Add hashlen_string() function George Spelvin
2016-05-28 19:57       ` [PATCH v3 03/10] <linux/sunrpc/svcauth.h>: Define hash_str() in terms of hashlen_string() George Spelvin
2016-05-28 19:57       ` [PATCH v3 04/10] Change hash_64() return value to 32 bits George Spelvin
2016-05-28 19:57       ` [PATCH v3 05/10] Eliminate bad hash multipliers from hash_32() and hash_64() George Spelvin
2016-05-28 19:57       ` [PATCH v3 06/10] fs/namei.c: Improve dcache hash function George Spelvin
2016-05-30 15:11         ` Peter Zijlstra
2016-05-30 16:06           ` George Spelvin
2016-05-30 16:27             ` Peter Zijlstra
2016-05-30 18:10               ` George Spelvin
2016-06-02  1:18                 ` Linus Torvalds
2016-06-02  2:31                   ` George Spelvin
2016-06-02 16:35                     ` Linus Torvalds
2016-06-02 18:23                       ` George Spelvin
2016-05-28 19:57       ` [PATCH v3 07/10] <linux/hash.h>: Add support for architecture-specific functions George Spelvin
2016-05-29  7:57         ` Geert Uytterhoeven
2016-05-28 19:57       ` [PATCH v3 08/10] m68k: Add <asm/hash.h> George Spelvin
2016-05-28 19:57       ` [PATCH v3 09/10] microblaze: " George Spelvin
2016-05-28 19:57       ` [PATCH v3 10/10] h8300: " George Spelvin
2016-05-28 20:47       ` [PATCH v3 00/10] String hash improvements Linus Torvalds
2016-05-28 20:54         ` George Spelvin
2016-06-02 22:59     ` [PATCH " Fubo Chen
2016-05-26 17:09   ` George Spelvin [this message]
2016-05-25  7:21 ` [PATCH 01/10] Pull out string hash to <linux/stringhash.h> George Spelvin
2016-05-25  7:22 ` [PATCH 02/10] fs/namei.c: Add hash_string() function George Spelvin
2016-05-25  7:26 ` [PATCH 03/10] <linux/sunrpc/svcauth.h>: Define hash_str() in terms of hash_string() George Spelvin
2016-05-25  7:28 ` [PATCH 04/10] Change hash_64() return value to 32 bits George Spelvin
2016-05-25  7:29 ` [PATCH 05/10] Eliminate bad hash multipliers from hash_32() and hash_64() George Spelvin
2016-05-25  7:31 ` [PATCH 06/10] fs/namei.c: Improve dcache hash function George Spelvin
2016-05-25  7:33 ` [PATCH 07/10] <linux/hash.h>: Add support for architecture-specific functions George Spelvin
2016-05-26 17:16   ` [PATCH v2 " George Spelvin
2016-05-25  7:34 ` [PATCH 08/10] m68k: Add <asm/archhash.h> George Spelvin
2016-05-25  7:34 ` George Spelvin
2016-05-25  8:07   ` Geert Uytterhoeven
2016-05-25  8:19     ` George Spelvin
2016-05-25  8:24     ` [PATCH 08v2/10] " George Spelvin
2016-05-25  8:48       ` Geert Uytterhoeven
2016-05-25  8:56   ` [PATCH 08/10] " Philippe De Muyter
2016-05-25  9:14     ` George Spelvin
2016-05-25  9:31       ` Andreas Schwab
2016-05-25  9:51       ` Philippe De Muyter
2016-05-25 13:24   ` Philippe De Muyter
2016-05-25 13:42     ` George Spelvin
2016-05-26 17:19   ` [PATCH v2 08/10] m68k: Add <asm/hash.h> George Spelvin
2016-05-25  7:37 ` [PATCH 09/10] microblaze: Add <asm/archhash.h> George Spelvin
2016-05-26 17:21   ` [PATCH v2 09/10] microblaze: Add <asm/hash.h> George Spelvin
2016-05-25  7:38 ` [PATCH 10/10] h8300: Add <asm/archhash.h> George Spelvin
2016-05-26 17:23   ` [PATCH v2 10/10] h8300: Add <asm/hash.h> George Spelvin

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