Changes in smt.h

09f37f2d - sched/smt: Always inline sched_smt_active()

Tue, 01 Apr 2025 04:26:44 +0000

sched/smt: Always inline sched_smt_active()sched_smt_active() can be called from noinstr code, so it should alwaysbe inlined. The CONFIG_SCHED_SMT version already has __always_inline.Do the same for its !CONFIG_SCHED_SMT counterpart.Fixes the following warning: vmlinux.o: error: objtool: intel_idle_ibrs+0x13: call to sched_smt_active() leaves .noinstr.text sectionFixes: 321a874a7ef8 ("sched/smt: Expose sched_smt_present static key")Reported-by: kernel test robot Signed-off-by: Josh Poimboeuf Signed-off-by: Ingo Molnar Cc: Linus Torvalds Link: https://lore.kernel.org/r/1d03907b0a247cf7fb5c1d518de378864f603060.1743481539.git.jpoimboe@kernel.orgCloses: https://lore.kernel.org/r/202503311434.lyw2Tveh-lkp@intel.com/ List of files: /linux-6.15/include/linux/sched/smt.h

1632d47f - sched/headers: Standardize the header guard #endif

Thu, 21 Sep 2023 09:28:48 +0000

sched/headers: Standardize the header guard #endifSigned-off-by: Ingo Molnar List of files: /linux-6.15/include/linux/sched/smt.h

a74cfffb - x86/speculation: Rework SMT state change

Sun, 25 Nov 2018 18:33:39 +0000

x86/speculation: Rework SMT state changearch_smt_update() is only called when the sysfs SMT control knob ischanged. This means that when SMT is enabled in the sysfs control knob thesystem is considered to have SMT active even if all siblings are offline.To allow finegrained control of the speculation mitigations, the actual SMTstate is more interesting than the fact that siblings could be enabled.Rework the code, so arch_smt_update() is invoked from each individual CPUhotplug function, and simplify the update function while at it.Signed-off-by: Thomas Gleixner Reviewed-by: Ingo Molnar Cc: Peter Zijlstra Cc: Andy Lutomirski Cc: Linus Torvalds Cc: Jiri Kosina Cc: Tom Lendacky Cc: Josh Poimboeuf Cc: Andrea Arcangeli Cc: David Woodhouse Cc: Tim Chen Cc: Andi Kleen Cc: Dave Hansen Cc: Casey Schaufler Cc: Asit Mallick Cc: Arjan van de Ven Cc: Jon Masters Cc: Waiman Long Cc: Greg KH Cc: Dave Stewart Cc: Kees Cook Cc: stable@vger.kernel.orgLink: https://lkml.kernel.org/r/20181125185004.521974984@linutronix.de List of files: /linux-6.15/include/linux/sched/smt.h

321a874a - sched/smt: Expose sched_smt_present static key

Sun, 25 Nov 2018 18:33:38 +0000

sched/smt: Expose sched_smt_present static keyMake the scheduler's 'sched_smt_present' static key globaly available, soit can be used in the x86 speculation control code.Provide a query function and a stub for the CONFIG_SMP=n case.Signed-off-by: Thomas Gleixner Reviewed-by: Ingo Molnar Cc: Peter Zijlstra Cc: Andy Lutomirski Cc: Linus Torvalds Cc: Jiri Kosina Cc: Tom Lendacky Cc: Josh Poimboeuf Cc: Andrea Arcangeli Cc: David Woodhouse Cc: Tim Chen Cc: Andi Kleen Cc: Dave Hansen Cc: Casey Schaufler Cc: Asit Mallick Cc: Arjan van de Ven Cc: Jon Masters Cc: Waiman Long Cc: Greg KH Cc: Dave Stewart Cc: Kees Cook Cc: stable@vger.kernel.orgLink: https://lkml.kernel.org/r/20181125185004.430168326@linutronix.de List of files: /linux-6.15/include/linux/sched/smt.h