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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> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Rspamd-Queue-Id: D0C7240011 X-Stat-Signature: xwrhhobs5jfhmkocskf7w1y5j69hgoo4 X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1775823691-122789 X-HE-Meta: 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 +fq+H+pD zU2wIbj5feUHM51K+Hny6HWUH44S1MrBBCLA+dpEDhGMI6Jeq98Q9lzd1twH+FmQbsETntWCsVA0UrGGYKLumnGNcin8Y4edP7gK6mpYiwJOwrK8soJLq7ktu1o79k3ElQp73CuY4+SkPDnwDGg7yoh9Ydcn3idCRNzH4ldZjJCxq2lMW3gPBg2oKKKh+pkANXTlj4mF8q4OesJLS9SMSKLKbt1lsOYBOKrty+wReICjyOK9KIrG93hguy2ob6P/Fnx5nKovRoDbVRg/mpa79wpMmByFVbbu+YtbZNHbFkkJWSztsMXiCfThibAOzG1hXJw43+DVTkFv36aUhkAkyUHwdQ9zDP6SSxQm9QO0ahh31lD1X5gS4IuSZ3rj0kV4+XNwkwrH8TpofofQ= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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);