{"id":2221797,"url":"http://patchwork.ozlabs.org/api/patches/2221797/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260410120317.776571540@kernel.org/","project":{"id":2,"url":"http://patchwork.ozlabs.org/api/projects/2/?format=json","name":"Linux PPC development","link_name":"linuxppc-dev","list_id":"linuxppc-dev.lists.ozlabs.org","list_email":"linuxppc-dev@lists.ozlabs.org","web_url":"https://github.com/linuxppc/wiki/wiki","scm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git","webscm_url":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/","list_archive_url":"https://lore.kernel.org/linuxppc-dev/","list_archive_url_format":"https://lore.kernel.org/linuxppc-dev/{}/","commit_url_format":"https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}"},"msgid":"<20260410120317.776571540@kernel.org>","list_archive_url":"https://lore.kernel.org/linuxppc-dev/20260410120317.776571540@kernel.org/","date":"2026-04-10T12:18:42","name":"[03/38] x86/apm: Remove last LATCH usage","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"0bcb602ce8821b41d570c2b8fb3596078edad428","submitter":{"id":92397,"url":"http://patchwork.ozlabs.org/api/people/92397/?format=json","name":"Thomas Gleixner","email":"tglx@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260410120317.776571540@kernel.org/mbox/","series":[{"id":499449,"url":"http://patchwork.ozlabs.org/api/series/499449/?format=json","web_url":"http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=499449","date":"2026-04-10T12:18:27","name":"treewide: Cleanup LATCH, CLOCK_TICK_RATE and get_cycles() [ab]use","version":1,"mbox":"http://patchwork.ozlabs.org/series/499449/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2221797/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2221797/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linuxppc-dev@lists.ozlabs.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=gYJITPmd;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; 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charset=UTF-8","cc":"Arnd Bergmann ,\n x86@kernel.org,\n Lu Baolu ,\n iommu@lists.linux.dev,\n Michael Grzeschik ,\n netdev@vger.kernel.org,\n linux-wireless@vger.kernel.org,\n Herbert Xu ,\n linux-crypto@vger.kernel.org,\n Vlastimil Babka ,\n linux-mm@kvack.org,\n David Woodhouse ,\n Bernie Thompson ,\n linux-fbdev@vger.kernel.org,\n \"Theodore Tso\" ,\n linux-ext4@vger.kernel.org,\n Andrew Morton ,\n Uladzislau Rezki ,\n Marco Elver ,\n Dmitry Vyukov ,\n kasan-dev@googlegroups.com,\n Andrey Ryabinin ,\n Thomas Sailer ,\n linux-hams@vger.kernel.org,\n \"Jason A. Donenfeld\" ,\n Richard Henderson ,\n linux-alpha@vger.kernel.org,\n Russell King ,\n linux-arm-kernel@lists.infradead.org,\n Catalin Marinas ,\n Huacai Chen ,\n loongarch@lists.linux.dev,\n Geert Uytterhoeven ,\n linux-m68k@lists.linux-m68k.org,\n Dinh Nguyen ,\n Jonas Bonn ,\n linux-openrisc@vger.kernel.org,\n Helge Deller ,\n linux-parisc@vger.kernel.org,\n Michael Ellerman ,\n linuxppc-dev@lists.ozlabs.org,\n Paul Walmsley ,\n linux-riscv@lists.infradead.org,\n Heiko Carstens ,\n linux-s390@vger.kernel.org,\n \"David S. Miller\" ,\n sparclinux@vger.kernel.org","X-Spam-Status":"No, score=-0.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED,\n\tDKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8","X-Spam-Checker-Version":"SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org"},"content":"LATCH is a historical leftover and has been replaced with PIT_LATCH in all\nother places a decade ago. Replace the last holdout and remove the\ndefinition from jiffies.h.\n\nThis allows to remove the otherwise unused CLOCK_TICK_RATE define in the\nnext step.\n\nSigned-off-by: Thomas Gleixner \n---\n arch/x86/kernel/apm_32.c | 4 ++--\n include/linux/jiffies.h | 3 ---\n 2 files changed, 2 insertions(+), 5 deletions(-)","diff":"--- a/arch/x86/kernel/apm_32.c\n+++ b/arch/x86/kernel/apm_32.c\n@@ -1196,9 +1196,9 @@ static void reinit_timer(void)\n \t/* set the clock to HZ */\n \toutb_p(0x34, PIT_MODE);\t\t/* binary, mode 2, LSB/MSB, ch 0 */\n \tudelay(10);\n-\toutb_p(LATCH & 0xff, PIT_CH0);\t/* LSB */\n+\toutb_p(PIT_LATCH & 0xff, PIT_CH0);\t/* LSB */\n \tudelay(10);\n-\toutb_p(LATCH >> 8, PIT_CH0);\t/* MSB */\n+\toutb_p(PIT_LATCH >> 8, PIT_CH0);\t/* MSB */\n \tudelay(10);\n \traw_spin_unlock_irqrestore(&i8253_lock, flags);\n #endif\n--- a/include/linux/jiffies.h\n+++ b/include/linux/jiffies.h\n@@ -56,9 +56,6 @@\n #define SH_DIV(NOM,DEN,LSH) ( (((NOM) / (DEN)) << (LSH)) \\\n + ((((NOM) % (DEN)) << (LSH)) + (DEN) / 2) / (DEN))\n \n-/* LATCH is used in the interval timer and ftape setup. */\n-#define LATCH ((CLOCK_TICK_RATE + HZ/2) / HZ)\t/* For divider */\n-\n extern void register_refined_jiffies(long clock_tick_rate);\n \n /* TICK_USEC is the time between ticks in usec */\n","prefixes":["03/38"]}