Subject: [patch 33/38] powerpc: Select ARCH_HAS_RANDOM_ENTROPY

From: Thomas Gleixner <[email-masked]>
Date: Fri, 10 Apr 2026 14:21:09 +0200

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 <[email-masked]>
Cc: Michael Ellerman <[email-masked]>
Cc: [email-masked]
---
 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 */