From: Thomas Gleixner <tglx@kernel•org>
To: LKML <linux-kernel@vger•kernel.org>
Cc: Michael Ellerman <mpe@ellerman•id.au>,
linuxppc-dev@lists•ozlabs.org, Arnd Bergmann <arnd@arndb•de>,
x86@kernel•org, Lu Baolu <baolu.lu@linux•intel.com>,
iommu@lists•linux.dev,
Michael Grzeschik <m.grzeschik@pengutronix•de>,
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Herbert Xu <herbert@gondor•apana.org.au>,
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linux-mm@kvack•org, David Woodhouse <dwmw2@infradead•org>,
Bernie Thompson <bernie@plugable•com>,
linux-fbdev@vger•kernel.org, "Theodore Tso" <tytso@mit•edu>,
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Thomas Sailer <t.sailer@alumni•ethz.ch>,
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Catalin Marinas <catalin.marinas@arm•com>,
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Dinh Nguyen <dinguyen@kernel•org>,
Jonas Bonn <jonas@southpole•se>,
linux-openrisc@vger•kernel.org, Helge Deller <deller@gmx•de>,
linux-parisc@vger•kernel.org, Paul Walmsley <pjw@kernel•org>,
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Heiko Carstens <hca@linux•ibm.com>,
linux-s390@vger•kernel.org,
"David S. Miller" <davem@davemloft•net>,
sparclinux@vger•kernel.org
Subject: [patch 33/38] powerpc: Select ARCH_HAS_RANDOM_ENTROPY
Date: Fri, 10 Apr 2026 14:21:09 +0200 [thread overview]
Message-ID: <20260410120319.789114053@kernel.org> (raw)
In-Reply-To: 20260410120044.031381086@kernel.org
The only remaining usage of get_cycles() is to provide random_get_entropy().
Switch powerpc over to the new scheme of selecting ARCH_HAS_RANDOM_ENTROPY
and providing random_get_entropy() in asm/random.h.
Remove asm/timex.h as it has no functionality anymore.
Signed-off-by: Thomas Gleixner <tglx@kernel•org>
Cc: Michael Ellerman <mpe@ellerman•id.au>
Cc: linuxppc-dev@lists•ozlabs.org
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/random.h | 13 +++++++++++++
arch/powerpc/include/asm/timex.h | 21 ---------------------
3 files changed, 14 insertions(+), 21 deletions(-)
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -150,6 +150,7 @@ config PPC
select ARCH_HAS_PREEMPT_LAZY
select ARCH_HAS_PTDUMP
select ARCH_HAS_PTE_SPECIAL
+ select ARCH_HAS_RANDOM_ENTROPY
select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
select ARCH_HAS_SET_MEMORY
select ARCH_HAS_STRICT_KERNEL_RWX if (PPC_BOOK3S || PPC_8xx) && !HIBERNATION
--- /dev/null
+++ b/arch/powerpc/include/asm/random.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_RANDOM_H
+#define _ASM_POWERPC_RANDOM_H
+
+#include <asm/cputable.h>
+#include <asm/vdso/timebase.h>
+
+static inline unsigned long random_get_entropy(void)
+{
+ return mftb();
+}
+
+#endif /* _ASM_POWERPC_RANDOM_H */
--- a/arch/powerpc/include/asm/timex.h
+++ b/arch/powerpc/include/asm/timex.h
@@ -1,21 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_POWERPC_TIMEX_H
-#define _ASM_POWERPC_TIMEX_H
-
-#ifdef __KERNEL__
-
-/*
- * PowerPC architecture timex specifications
- */
-
-#include <asm/cputable.h>
-#include <asm/vdso/timebase.h>
-
-ostatic inline cycles_t get_cycles(void)
-{
- return mftb();
-}
-#define get_cycles get_cycles
-
-#endif /* __KERNEL__ */
-#endif /* _ASM_POWERPC_TIMEX_H */
next prev parent reply other threads:[~2026-04-10 12:21 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-10 12:18 [patch 00/38] treewide: Cleanup LATCH, CLOCK_TICK_RATE and get_cycles() [ab]use Thomas Gleixner
2026-04-10 12:18 ` [patch 01/38] percpu: Sanitize __percpu_qual include hell Thomas Gleixner
2026-04-10 12:18 ` [patch 02/38] x86: Cleanup include recursion hell Thomas Gleixner
2026-04-10 20:55 ` [patch V1.1 " Thomas Gleixner
2026-04-10 12:18 ` [patch 03/38] x86/apm: Remove last LATCH usage Thomas Gleixner
2026-04-10 12:18 ` [patch 04/38] x86: Use PIT_TICK_RATE instead of CLOCK_TICK_RATE Thomas Gleixner
2026-04-10 12:18 ` [patch 05/38] treewide: Remove CLOCK_TICK_RATE Thomas Gleixner
2026-04-15 6:40 ` Christophe Leroy (CS GROUP)
2026-04-16 11:22 ` Geert Uytterhoeven
2026-04-10 12:18 ` [patch 06/38] calibrate: Rework delay timer calibration Thomas Gleixner
2026-04-10 12:19 ` [patch 07/38] treewide: Consolidate cycles_t Thomas Gleixner
2026-04-13 9:15 ` Ojaswin Mujoo
2026-04-15 6:43 ` Christophe Leroy (CS GROUP)
2026-04-16 19:32 ` Thomas Gleixner
2026-04-16 11:22 ` Geert Uytterhoeven
2026-04-10 12:19 ` [patch 08/38] x86/tsc: Use rdtsc() instead of get_cycles() Thomas Gleixner
2026-04-10 12:19 ` [patch 09/38] iommu/vt-d: Use sched_clock() " Thomas Gleixner
2026-04-10 13:45 ` Baolu Lu
2026-04-10 15:14 ` Thomas Gleixner
2026-04-10 12:19 ` [patch 10/38] arcnet: Remove function timing code Thomas Gleixner
2026-04-13 15:29 ` David Woodhouse
2026-04-10 12:19 ` [patch 11/38] misc: sgi-gru: Remove get_cycles() [ab]use Thomas Gleixner
2026-04-10 20:56 ` [patch V1.1 " Thomas Gleixner
2026-04-10 12:19 ` [patch 12/38] wifi: wil6210: Replace get_cyles() usage Thomas Gleixner
2026-04-10 12:19 ` [patch 13/38] crypto: tcrypt: Replace get_cycles() with ktime_get() Thomas Gleixner
2026-04-10 12:19 ` [patch 14/38] slub: Use prandom instead of get_cycles() Thomas Gleixner
2026-04-10 12:19 ` [patch 15/38] ptp: ptp_vmclock: Replace get_cycles() usage Thomas Gleixner
2026-04-13 15:33 ` David Woodhouse
2026-04-13 19:30 ` Arnd Bergmann
2026-04-10 12:19 ` [patch 16/38] fbdev: udlfb: Replace get_cycles() with ktime_get() Thomas Gleixner
2026-04-10 12:19 ` [patch 17/38] ext4: Replace get_cycles() usage " Thomas Gleixner
2026-04-13 14:46 ` Arnd Bergmann
2026-04-10 12:19 ` [patch 18/38] lib/tests: Replace get_cycles() " Thomas Gleixner
2026-04-16 10:24 ` Geert Uytterhoeven
2026-04-10 12:20 ` [patch 19/38] kcsan: Replace get_cycles() usage Thomas Gleixner
2026-04-10 13:39 ` Marco Elver
2026-04-10 12:20 ` [patch 20/38] kasan: sw_tags: Replace get_cycles() by random_get_entropy() Thomas Gleixner
2026-04-10 12:20 ` [patch 21/38] hamradio: baycom_epp: Remove BAYCOM_DEBUG Thomas Gleixner
2026-04-10 12:20 ` [patch 22/38] random: Provide CONFIG_ARCH_HAS_RANDOM_ENTROPY Thomas Gleixner
2026-04-10 12:20 ` [patch 23/38] alpha: Select ARCH_HAS_RANDOM_ENTROPY Thomas Gleixner
2026-04-12 13:22 ` Magnus Lindholm
2026-04-10 12:20 ` [patch 24/38] ARM: " Thomas Gleixner
2026-04-10 12:20 ` [patch 25/38] arm64: " Thomas Gleixner
2026-04-10 12:20 ` [patch 26/38] loongarch: " Thomas Gleixner
2026-04-10 12:20 ` [patch 27/38] m68k: " Thomas Gleixner
2026-04-10 15:31 ` Daniel Palmer
2026-04-16 11:22 ` Geert Uytterhoeven
2026-04-10 12:20 ` [patch 28/38] mips: " Thomas Gleixner
2026-04-13 5:47 ` Maciej W. Rozycki
2026-04-10 12:20 ` [patch 29/38] nios2: " Thomas Gleixner
2026-04-10 12:20 ` [patch 30/38] openrisc: " Thomas Gleixner
2026-04-12 8:56 ` Stafford Horne
2026-04-10 12:21 ` [patch 31/38] parisc: " Thomas Gleixner
2026-04-14 12:41 ` Helge Deller
2026-04-10 12:21 ` [patch 32/38] powerpc/spufs: Use mftb() directly Thomas Gleixner
2026-04-13 14:43 ` Arnd Bergmann
2026-04-15 6:38 ` Christophe Leroy (CS GROUP)
2026-04-21 6:48 ` Mukesh Kumar Chaurasiya
2026-04-10 12:21 ` Thomas Gleixner [this message]
2026-04-15 6:47 ` [patch 33/38] powerpc: Select ARCH_HAS_RANDOM_ENTROPY Christophe Leroy (CS GROUP)
2026-04-21 11:22 ` Mukesh Kumar Chaurasiya
2026-04-10 12:21 ` [patch 34/38] riscv: " Thomas Gleixner
2026-04-10 12:21 ` [patch 35/38] s390: " Thomas Gleixner
2026-04-16 13:42 ` Heiko Carstens
2026-04-16 19:29 ` Thomas Gleixner
2026-04-10 12:21 ` [patch 36/38] sparc: Select ARCH_HAS_RANDOM_ENTROPY for SPARC64 Thomas Gleixner
2026-04-10 12:21 ` [patch 37/38] x86: Select ARCH_HAS_RANDOM_ENTROPY Thomas Gleixner
2026-04-10 12:21 ` [patch 38/38] treewide: Remove asm/timex.h includes from generic code Thomas Gleixner
2026-04-13 14:45 ` Arnd Bergmann
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