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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 20/38] kasan: sw_tags: Replace get_cycles() by random_get_entropy() References: <20260410120044.031381086@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 3B11D140002 X-Stat-Signature: fn1pc3g9igqcuauwpqbt5qc154hnyiwg X-HE-Tag: 1775823610-219392 X-HE-Meta: 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 XdEtxwNU 4Ik32x9Ix6Y+VeEcMHbEHYm2p4yo27KSm/SK19Ecd+Hf/FOmJmxb3EzD/PEq+NG+ZZnuoNI5l7QXMGhdLW1zpUOngbZd7g0TrQ5jWTUqjSIiD8liHoY3HLFFbnjurHbPrc0oPwDNRWUZEvwoMQcNU0VuQbQSLmhwBGJjxmJAy3/XQ4xzGDOGBAT6R3sKOAb9UWn/x5WXAAlvVNLpk5xIJMyes9ejO4TXMWRb8vXc/DEf+P+ZRLyboSEucrvim8zg6vUk4fWV6oIZFiig1Bnyehq5r1yQjnYn5ju1LuAG/Zuxn5a+7O0GEwioVMaAyoMCydzvZwy8ffBJ/FFQBNfXvfjih/vOySYvcL6MXbHYVe1gNCuMh2fL6zPH+SQimMbviDlqgr9ig0LDqS3DHNpax7o3q0wl7JvozZ3qthROroyGi980zC7V5gCsEBTVD7RU2FL9M Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Seeding the random state with get_cycles() is functionally equivalent on the architectures which provide get_cycles(), but it does not make sense semantically. Use random_get_entropy() instead, which is the proper interface. This is part of a larger effort to remove get_cycles() usage from non-architecture code. Signed-off-by: Thomas Gleixner Cc: Andrey Ryabinin Cc: kasan-dev@googlegroups.com --- mm/kasan/sw_tags.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/kasan/sw_tags.c +++ b/mm/kasan/sw_tags.c @@ -41,7 +41,7 @@ void __init kasan_init_sw_tags(void) int cpu; for_each_possible_cpu(cpu) - per_cpu(prng_state, cpu) = (u32)get_cycles(); + per_cpu(prng_state, cpu) = (u32)random_get_entropy(); kasan_init_tags(); kasan_enable();