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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, Dinh Nguyen , 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 37/38] x86: Select ARCH_HAS_RANDOM_ENTROPY References: <20260410120044.031381086@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 The only remaining usage of get_cycles() is to provide random_get_entropy(). Switch x86 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 Cc: x86@kernel.org --- arch/x86/Kconfig | 1 + arch/x86/include/asm/random.h | 16 ++++++++++++++++ arch/x86/include/asm/timex.h | 17 ----------------- arch/x86/include/asm/tsc.h | 9 --------- 4 files changed, 17 insertions(+), 26 deletions(-) --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -101,6 +101,7 @@ config X86 select ARCH_HAS_PREEMPT_LAZY select ARCH_HAS_PTDUMP select ARCH_HAS_PTE_SPECIAL + select ARCH_HAS_RANDOM_ENTROPY select ARCH_HAS_HW_PTE_YOUNG select ARCH_HAS_NONLEAF_PMD_YOUNG if PGTABLE_LEVELS > 2 select ARCH_HAS_UACCESS_FLUSHCACHE if X86_64 --- /dev/null +++ b/arch/x86/include/asm/random.h @@ -0,0 +1,16 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_X86_RANDOM_H +#define _ASM_X86_RANDOM_H + +#include +#include + +static inline unsigned long random_get_entropy(void) +{ + if (!IS_ENABLED(CONFIG_X86_TSC) && + !cpu_feature_enabled(X86_FEATURE_TSC)) + return random_get_entropy_fallback(); + return rdtsc(); +} + +#endif /* _ASM_X86_RANDOM_H */ --- a/arch/x86/include/asm/timex.h +++ /dev/null @@ -1,17 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_X86_TIMEX_H -#define _ASM_X86_TIMEX_H - -#include -#include - -static inline unsigned long random_get_entropy(void) -{ - if (!IS_ENABLED(CONFIG_X86_TSC) && - !cpu_feature_enabled(X86_FEATURE_TSC)) - return random_get_entropy_fallback(); - return rdtsc(); -} -#define random_get_entropy random_get_entropy - -#endif /* _ASM_X86_TIMEX_H */ --- a/arch/x86/include/asm/tsc.h +++ b/arch/x86/include/asm/tsc.h @@ -72,15 +72,6 @@ extern unsigned int tsc_khz; extern void disable_TSC(void); -static inline cycles_t get_cycles(void) -{ - if (!IS_ENABLED(CONFIG_X86_TSC) && - !cpu_feature_enabled(X86_FEATURE_TSC)) - return 0; - return rdtsc(); -} -#define get_cycles get_cycles - extern void tsc_early_init(void); extern void tsc_init(void); extern void mark_tsc_unstable(char *reason);