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Donenfeld" , Richard Henderson , linux-alpha@vger.kernel.org, Russell King , linux-arm-kernel@lists.infradead.org, Catalin Marinas , Huacai Chen , loongarch@lists.linux.dev, Geert Uytterhoeven , linux-m68k@lists.linux-m68k.org, Jonas Bonn , linux-openrisc@vger.kernel.org, Helge Deller , linux-parisc@vger.kernel.org, Michael Ellerman , linuxppc-dev@lists.ozlabs.org, Paul Walmsley , linux-riscv@lists.infradead.org, Heiko Carstens , linux-s390@vger.kernel.org, "David S. Miller" , sparclinux@vger.kernel.org Subject: [patch 29/38] nios2: Select ARCH_HAS_RANDOM_ENTROPY References: <20260410120044.031381086@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Rspam-User: X-Stat-Signature: 71apqitootkwpwecznadj7ymg8a5yryr X-Rspamd-Queue-Id: C5356A0017 X-Rspamd-Server: rspam09 X-HE-Tag: 1775823654-290609 X-HE-Meta: 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 33kq7Czc 5oLAyuZG0x8V6e6YSOeoDiKAS5gGkvxSl+jEKDnJgOII3GJKb/Gm4QV/0vXb4ceDOSHM2U27sDgfEZW+qMvmErPSZXefEFGHbj2nb2hQRPasCjsmghycPEPwdwRfuWVD+nxisJ/cS1wsEOBkha39nTO5wsHA/xX+6oGLEahQKIoPbqrYGXV9XqqqvdwnDhfLW47HUIhZ2DFdsNu4TBYmL7d7B/v8g5NSrk8Ouz9nd/SmyWT7oxl2MjbQJOLgfM7kEnx2gWJqBsxSLdy2Mpc3AJRztVrOT9cLM3mc/7jGK1oWIldvEdEiTeYDApe6Nk7dF1xZv6szE1nWVTtppFoJwcyIAj/mZKbtXDzN6KWNDxU0MBh9FdW1J8yAlreeI80OqfNZGlsWa9Ka4KCs= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The only remaining non-architecture usage of get_cycles() is to provide random_get_entropy(). Switch nios2 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 Cc: Dinh Nguyen --- arch/nios2/Kconfig | 1 + arch/nios2/include/asm/random.h | 14 ++++++++++++++ arch/nios2/include/asm/timex.h | 5 +---- arch/nios2/kernel/time.c | 4 ++-- 4 files changed, 18 insertions(+), 6 deletions(-) --- a/arch/nios2/Kconfig +++ b/arch/nios2/Kconfig @@ -7,6 +7,7 @@ config NIOS2 select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_HAS_DMA_SET_UNCACHED + select ARCH_HAS_RANDOM_ENTROPY select ARCH_NO_SWAP select COMMON_CLK select TIMER_OF --- /dev/null +++ b/arch/nios2/include/asm/random.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _ASM_NIOS2_RANDOM_H +#define _ASM_NIOS2_RANDOM_H + +#include + +static inline unsigned long random_get_entropy(void) +{ + unsigned long c = get_cycles(); + + return c ? c : random_get_entropy_fallback(); +} + +#endif --- a/arch/nios2/include/asm/timex.h +++ b/arch/nios2/include/asm/timex.h @@ -5,9 +5,6 @@ #ifndef _ASM_NIOS2_TIMEX_H #define _ASM_NIOS2_TIMEX_H -extern cycles_t get_cycles(void); -#define get_cycles get_cycles - -#define random_get_entropy() (((unsigned long)get_cycles()) ?: random_get_entropy_fallback()) +cycles_t get_cycles(void); #endif --- a/arch/nios2/kernel/time.c +++ b/arch/nios2/kernel/time.c @@ -7,7 +7,6 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. */ - #include #include #include @@ -19,6 +18,8 @@ #include #include +#include + #define ALTR_TIMER_COMPATIBLE "altr,timer-1.0" #define ALTERA_TIMER_STATUS_REG 0 @@ -112,7 +113,6 @@ cycles_t get_cycles(void) return nios2_timer_read(&nios2_cs.cs); return 0; } -EXPORT_SYMBOL(get_cycles); static void nios2_timer_start(struct nios2_timer *timer) {