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Peter Anvin" Cc: linux-kernel , Eric Dumazet , Eric Dumazet Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Avoid one call/ret in networking RPS/RFS fast path, with no space cost. scripts/bloat-o-meter -t vmlinux.before vmlinux.after add/remove: 0/2 grow/shrink: 2/0 up/down: 96/-97 (-1) Function old new delta x2apic_send_IPI 146 198 +52 __x2apic_send_IPI_mask 326 370 +44 __pfx___x2apic_send_IPI_dest 16 - -16 __x2apic_send_IPI_dest 81 - -81 Total: Before=3D20861234, After=3D20861233, chg -0.00% Signed-off-by: Eric Dumazet --- v2: added CONFIG_X86_X2APIC dependency (kernel test robot), updated bloat-o= -meter v1: https://lore.kernel.org/lkml/CANn89iJ4r5hrqE=3DLj16XVNFM7iZ+XB+JsXU8gE5= ryeuG6kf1Sg@mail.gmail.com/T/#mc7288459ec504831a9888cb0e5c4dbdae253f263 arch/x86/kernel/apic/local.h | 10 +++++++++- arch/x86/kernel/apic/x2apic_phys.c | 6 ------ 2 files changed, 9 insertions(+), 7 deletions(-) diff --git a/arch/x86/kernel/apic/local.h b/arch/x86/kernel/apic/local.h index bdcf609eb283..0e5dd6772d6a 100644 --- a/arch/x86/kernel/apic/local.h +++ b/arch/x86/kernel/apic/local.h @@ -14,7 +14,6 @@ #include =20 /* X2APIC */ -void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int = dest); u32 x2apic_get_apic_id(u32 id); =20 void x2apic_send_IPI_all(int vector); @@ -42,6 +41,15 @@ static inline unsigned int __prepare_ICR(unsigned int sh= ortcut, int vector, return icr; } =20 +#ifdef CONFIG_X86_X2APIC +static inline void __x2apic_send_IPI_dest(unsigned int apicid, int vector, + unsigned int dest) +{ + unsigned long cfg =3D __prepare_ICR(0, vector, dest); + native_x2apic_icr_write(cfg, apicid); +} +#endif + void default_init_apic_ldr(void); =20 void apic_mem_wait_icr_idle(void); diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2ap= ic_phys.c index 12d4c35547a6..10f79026e8e3 100644 --- a/arch/x86/kernel/apic/x2apic_phys.c +++ b/arch/x86/kernel/apic/x2apic_phys.c @@ -107,12 +107,6 @@ void x2apic_send_IPI_self(int vector) apic_write(APIC_SELF_IPI, vector); } =20 -void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int = dest) -{ - unsigned long cfg =3D __prepare_ICR(0, vector, dest); - native_x2apic_icr_write(cfg, apicid); -} - static int x2apic_phys_probe(void) { if (!x2apic_mode) --=20 2.52.0.351.gbe84eed79e-goog