[patch 23/38] alpha: Select ARCH_HAS_RANDOM_ENTROPY

[Thomas Gleixner]

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

Switch alpha 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 at kernel.org>
Cc: Richard Henderson <richard.henderson at linaro.org>
Cc: linux-alpha at vger.kernel.org
---
 arch/alpha/Kconfig              |    1 +
 arch/alpha/include/asm/random.h |   14 ++++++++++++++
 arch/alpha/include/asm/timex.h  |   26 --------------------------
 3 files changed, 15 insertions(+), 26 deletions(-)

--- a/arch/alpha/Kconfig
+++ b/arch/alpha/Kconfig
@@ -5,6 +5,7 @@ config ALPHA
 	select ARCH_32BIT_USTAT_F_TINODE
 	select ARCH_HAS_CURRENT_STACK_POINTER
 	select ARCH_HAS_DMA_OPS if PCI
+	select ARCH_HAS_RANDOM_ENTROPY
 	select ARCH_MIGHT_HAVE_PC_PARPORT
 	select ARCH_MIGHT_HAVE_PC_SERIO
 	select ARCH_MODULE_NEEDS_WEAK_PER_CPU if SMP
--- /dev/null
+++ b/arch/alpha/include/asm/random.h
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASMALPHA_RANDOM_H
+#define _ASMALPHA_RANDOM_H
+
+/* Use the cycle counter for entropy. */
+static inline unsigned long random_get_entropy(void)
+{
+	unsigned long ret;
+
+	__asm__ __volatile__ ("rpcc %0" : "=r"(ret));
+	return ret;
+}
+
+#endif
--- a/arch/alpha/include/asm/timex.h
+++ /dev/null
@@ -1,26 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * linux/include/asm-alpha/timex.h
- *
- * ALPHA architecture timex specifications
- */
-#ifndef _ASMALPHA_TIMEX_H
-#define _ASMALPHA_TIMEX_H
-
-/*
- * Standard way to access the cycle counter.
- * Currently only used on SMP for scheduling.
- *
- * Only the low 32 bits are available as a continuously counting entity. 
- * But this only means we'll force a reschedule every 8 seconds or so,
- * which isn't an evil thing.
- */
-static inline cycles_t get_cycles (void)
-{
-	cycles_t ret;
-	__asm__ __volatile__ ("rpcc %0" : "=r"(ret));
-	return ret;
-}
-#define get_cycles get_cycles
-
-#endif