From 0049f04c7dfe977a0f8f6935071db3416e641837 Mon Sep 17 00:00:00 2001 From: Thorsten Blum Date: Mon, 18 Mar 2024 11:47:23 +0100 Subject: x86/apic: Improve data types to fix Coccinelle warnings Given that acpi_pm_read_early() returns a u32 (masked to 24 bits), several variables that store its return value are improved by adjusting their data types from unsigned long to u32. Specifically, change deltapm's type from long to u32 because its value fits into 32 bits and it cannot be negative. These data type improvements resolve the following two Coccinelle/ coccicheck warnings reported by do_div.cocci: arch/x86/kernel/apic/apic.c:734:1-7: WARNING: do_div() does a 64-by-32 division, please consider using div64_long instead. arch/x86/kernel/apic/apic.c:742:2-8: WARNING: do_div() does a 64-by-32 division, please consider using div64_long instead. Signed-off-by: Thorsten Blum Signed-off-by: Dave Hansen Reviewed-by: Dave Hansen Link: https://lore.kernel.org/all/20240318104721.117741-3-thorsten.blum%40toblux.com --- arch/x86/kernel/apic/apic.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'arch') diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index a42d8a6f7149..e5c9cadc63e1 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -631,7 +631,7 @@ void lapic_update_tsc_freq(void) static __initdata int lapic_cal_loops = -1; static __initdata long lapic_cal_t1, lapic_cal_t2; static __initdata unsigned long long lapic_cal_tsc1, lapic_cal_tsc2; -static __initdata unsigned long lapic_cal_pm1, lapic_cal_pm2; +static __initdata u32 lapic_cal_pm1, lapic_cal_pm2; static __initdata unsigned long lapic_cal_j1, lapic_cal_j2; /* @@ -641,7 +641,7 @@ static void __init lapic_cal_handler(struct clock_event_device *dev) { unsigned long long tsc = 0; long tapic = apic_read(APIC_TMCCT); - unsigned long pm = acpi_pm_read_early(); + u32 pm = acpi_pm_read_early(); if (boot_cpu_has(X86_FEATURE_TSC)) tsc = rdtsc(); @@ -666,7 +666,7 @@ static void __init lapic_cal_handler(struct clock_event_device *dev) } static int __init -calibrate_by_pmtimer(long deltapm, long *delta, long *deltatsc) +calibrate_by_pmtimer(u32 deltapm, long *delta, long *deltatsc) { const long pm_100ms = PMTMR_TICKS_PER_SEC / 10; const long pm_thresh = pm_100ms / 100; @@ -677,7 +677,7 @@ calibrate_by_pmtimer(long deltapm, long *delta, long *deltatsc) return -1; #endif - apic_printk(APIC_VERBOSE, "... PM-Timer delta = %ld\n", deltapm); + apic_printk(APIC_VERBOSE, "... PM-Timer delta = %u\n", deltapm); /* Check, if the PM timer is available */ if (!deltapm) -- cgit v1.2.3