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Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Arnaldo Carvalho de Melo , Paolo Bonzini , Arnd Bergmann , Frederic Weisbecker , "Paul E. McKenney" , Jason Baron , Steven Rostedt , Ard Biesheuvel , Sami Tolvanen , "David S. Miller" , Neeraj Upadhyay , Joel Fernandes , Josh Triplett , Boqun Feng , Uladzislau Rezki , Mathieu Desnoyers , Mel Gorman , Andrew Morton , Masahiro Yamada , Han Shen , Rik van Riel , Jann Horn , Dan Carpenter , Oleg Nesterov , Juri Lelli , Clark Williams , Tomas Glozar , Yair Podemsky , Marcelo Tosatti , Daniel Wagner , Petr Tesarik , Shrikanth Hegde Subject: [PATCH v9 05/10] jump_label: Add annotations for validating .entry.text key usage Date: Tue, 5 May 2026 10:23:50 +0200 Message-ID: <20260505082355.1982003-6-vschneid@redhat.com> In-Reply-To: <20260505082355.1982003-1-vschneid@redhat.com> References: <20260505082355.1982003-1-vschneid@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-MFC-PROC-ID: Q-VIHcgn8lxZ73QDst-6P0GvzSAQqIKt1r5Bn4f-2aI_1777969552 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true X-Stat-Signature: bnaoeyzutuu3h74zfthyyp17r3hzgbcu X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: A4892160004 X-Rspam-User: X-HE-Tag: 1777969561-632238 X-HE-Meta: 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 DHlDp5/V 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Josh Poimboeuf Adding static keys to entry text needs to be done with care, as they may be executed before a context serialization operation has been run. Add DEFINE_STATIC_KEY_*_ENTRY() variants for those. They don't do anything special yet; that will come later. Signed-off-by: Josh Poimboeuf [Reduced from .noinstr to .entry.text] Signed-off-by: Valentin Schneider --- include/linux/jump_label.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h index b9c7b0ebf7b9d..e05b4a52ba1b4 100644 --- a/include/linux/jump_label.h +++ b/include/linux/jump_label.h @@ -374,6 +374,20 @@ struct static_key_false { #define DEFINE_STATIC_KEY_FALSE_RO(name) \ struct static_key_false name __ro_after_init = STATIC_KEY_FALSE_INIT +/* + * Objtool will warn about static keys used in early entry code, as they may + * be unsafe if executed before any serializing operation. + * + * The _ENTRY variants are used to tell objtool the static key is safe to be + * used. If using one of these _ENTRY variants, please add a comment above the + * definition with the rationale. + */ +#define DEFINE_STATIC_KEY_TRUE_ENTRY(name) \ + DEFINE_STATIC_KEY_TRUE(name) + +#define DEFINE_STATIC_KEY_FALSE_ENTRY(name) \ + DEFINE_STATIC_KEY_FALSE(name) + #define DECLARE_STATIC_KEY_FALSE(name) \ extern struct static_key_false name -- 2.52.0