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Peter Anvin" Subject: [PATCH v3 0/3] x86/alternative: Patch a single alternative location only once Date: Mon, 10 Nov 2025 09:23:36 +0100 Message-ID: <20251110082339.30144-1-jgross@suse.com> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[99.99%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; ARC_NA(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_TRACE(0.00)[0:+]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; FUZZY_RATELIMITED(0.00)[rspamd.com]; RCVD_TLS_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; RCPT_COUNT_SEVEN(0.00)[8]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.com:mid] X-Spam-Flag: NO X-Spam-Score: -2.80 X-Spam-Level: Instead of patching a single location potentially multiple times in case of nested ALTERNATIVE()s, do the patching only after having evaluated all alt_instr instances for that location. Changes in V2: - complete rework (Boris Petkov) Changes in V3: - split former V2 patch into 2 by introducing a helper function (Boris Petkov) - repost the small cleanup patch 1 which was taken before, but has somehow vanished from the tip x86/alternative branch (it is still in the tip master branch, but I couldn't find it in any other tip branch). Juergen Gross (3): x86/alternative: Drop not needed test after call of alt_replace_call() x86/alternative: Use a helper function for patching alternatives x86/alternative: Patch a single alternative location only once arch/x86/kernel/alternative.c | 135 +++++++++++++++++++--------------- 1 file changed, 76 insertions(+), 59 deletions(-) -- 2.51.0