[patch 31/38] parisc: Select ARCH_HAS_RANDOM_ENTROPY

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

Switch parisc over to the new scheme of selecting ARCH_HAS_RANDOM_ENTROPY
and providing random_get_entropy() in asm/random.h.

Add 'asm/timex.h' includes to the relevant files, so the global include can
be removed once all architectures are converted over.

Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: [email protected]
---
 arch/parisc/Kconfig              |    1 +
 arch/parisc/include/asm/random.h |   12 ++++++++++++
 arch/parisc/include/asm/timex.h  |    6 ------
 arch/parisc/kernel/processor.c   |    1 +
 arch/parisc/kernel/time.c        |    1 +
 5 files changed, 15 insertions(+), 6 deletions(-)

--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -16,6 +16,7 @@ config PARISC
 	select ARCH_HAS_STRICT_MODULE_RWX
 	select ARCH_HAS_UBSAN
 	select ARCH_HAS_PTE_SPECIAL
+	select ARCH_HAS_RANDOM_ENTROPY
 	select ARCH_NO_SG_CHAIN
 	select ARCH_SPLIT_ARG64 if !64BIT
 	select ARCH_SUPPORTS_HUGETLBFS if PA20
--- /dev/null
+++ b/arch/parisc/include/asm/random.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASMPARISC_RANDOM_H
+#define _ASMPARISC_RANDOM_H
+
+#include <asm/timex.h>
+
+static inline unsigned long random_get_entropy(void)
+{
+	return get_cycles();
+}
+
+#endif
--- a/arch/parisc/include/asm/timex.h
+++ b/arch/parisc/include/asm/timex.h
@@ -1,9 +1,4 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/*
- * linux/include/asm-parisc/timex.h
- *
- * PARISC architecture timex specifications
- */
 #ifndef _ASMPARISC_TIMEX_H
 #define _ASMPARISC_TIMEX_H
 
@@ -13,6 +8,5 @@ static inline cycles_t get_cycles(void)
 {
 	return mfctl(16);
 }
-#define get_cycles get_cycles
 
 #endif
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -30,6 +30,7 @@
 #include <asm/pdcpat.h>
 #include <asm/irq.h>		/* for struct irq_region */
 #include <asm/parisc-device.h>
+#include <asm/timex.h>
 
 struct system_cpuinfo_parisc boot_cpu_data __ro_after_init;
 EXPORT_SYMBOL(boot_cpu_data);
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -17,6 +17,7 @@
 #include <linux/platform_device.h>
 #include <asm/processor.h>
 #include <asm/pdcpat.h>
+#include <asm/timex.h>
 
 static u64 cr16_clock_freq;
 static unsigned long clocktick;