[patch 27/38] m68k: Select ARCH_HAS_RANDOM_ENTROPY

Thomas Gleixner
2026-04-10T12:20:46Z

The only remaining usage of get_cycles() is to provide
random_get_entropy().

Switch m68k 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: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-m68k@lists.linux-m68k.org
---
arch/m68k/Kconfig | 1 +
arch/m68k/amiga/config.c | 1 +
arch/m68k/include/asm/random.h | 14 ++++++++++++++
arch/m68k/include/asm/timex.h | 25 -------------------------
arch/m68k/kernel/time.c | 2 +-
5 files changed, 17 insertions(+), 26 deletions(-)

--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -8,6 +8,7 @@ config M68K
select ARCH_HAS_CPU_FINALIZE_INIT if MMU
select ARCH_HAS_CURRENT_STACK_POINTER
select ARCH_HAS_DMA_PREP_COHERENT if M68K_NONCOHERENT_DMA && !COLDFIRE
+ select ARCH_HAS_RANDOM_ENTROPY
select ARCH_HAS_SYNC_DMA_FOR_DEVICE if M68K_NONCOHERENT_DMA
select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
select ARCH_MIGHT_HAVE_PC_PARPORT if ISA
--- a/arch/m68k/amiga/config.c
+++ b/arch/m68k/amiga/config.c
@@ -36,6 +36,7 @@
#include <asm/machdep.h>
#include <asm/io.h>
#include <asm/config.h>
+#include <asm/random.h>

#include "amiga.h"

--- /dev/null
+++ b/arch/m68k/include/asm/random.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASMm68K_RANDOM_H
+#define _ASMm68K_RANDOM_H
+
+extern unsigned long (*mach_random_get_entropy)(void);
+
+static inline unsigned long random_get_entropy(void)
+{
+ if (mach_random_get_entropy)
+ return mach_random_get_entropy();
+ return random_get_entropy_fallback();
+}
+
+#endif
--- a/arch/m68k/include/asm/timex.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * linux/include/asm-m68k/timex.h
- *
- * m68k architecture timex specifications
- */
-#ifndef _ASMm68K_TIMEX_H
-#define _ASMm68K_TIMEX_H
-
-static inline cycles_t get_cycles(void)
-{
- return 0;
-}
-
-extern unsigned long (*mach_random_get_entropy)(void);
-
-static inline unsigned long random_get_entropy(void)
-{
- if (mach_random_get_entropy)
- return mach_random_get_entropy();
- return random_get_entropy_fallback();
-}
-#define random_get_entropy random_get_entropy
-
-#endif
--- a/arch/m68k/kernel/time.c
+++ b/arch/m68k/kernel/time.c
@@ -26,12 +26,12 @@
#include <asm/machdep.h>
#include <asm/io.h>
#include <asm/irq_regs.h>
+#include <asm/random.h>

#include <linux/time.h>
#include <linux/timex.h>
#include <linux/profile.h>

-
unsigned long (*mach_random_get_entropy)(void);
EXPORT_SYMBOL_GPL(mach_random_get_entropy);