From: Qian Cai <cai@lca.pw> To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de Cc: hpa@zytor.com, x86@kernel.org, linux-kernel@vger.kernel.org, Qian Cai <cai@lca.pw> Subject: [PATCH] x86/apic: silence compiler -Wtype-limits warnings Date: Mon, 8 Jul 2019 17:36:45 -0400 Message-ID: <1562621805-24789-1-git-send-email-cai@lca.pw> (raw) There are many compiler warnings like this, In file included from ./arch/x86/include/asm/smp.h:13, from ./arch/x86/include/asm/mmzone_64.h:11, from ./arch/x86/include/asm/mmzone.h:5, from ./include/linux/mmzone.h:969, from ./include/linux/gfp.h:6, from ./include/linux/mm.h:10, from arch/x86/kernel/apic/io_apic.c:34: arch/x86/kernel/apic/io_apic.c: In function 'check_timer': ./arch/x86/include/asm/apic.h:37:11: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] if ((v) <= apic_verbosity) \ ^~ arch/x86/kernel/apic/io_apic.c:2160:2: note: in expansion of macro 'apic_printk' apic_printk(APIC_QUIET, KERN_INFO "..TIMER: vector=0x%02X " ^~~~~~~~~~~ ./arch/x86/include/asm/apic.h:37:11: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] if ((v) <= apic_verbosity) \ ^~ arch/x86/kernel/apic/io_apic.c:2207:4: note: in expansion of macro 'apic_printk' apic_printk(APIC_QUIET, KERN_ERR "..MP-BIOS bug: " ^~~~~~~~~~~ APIC_QUIET is 0, so silence them by making "apic_verbosity" an "int" which is a simpler fix than adding more checks in apic_printk(). Signed-off-by: Qian Cai <cai@lca.pw> --- arch/x86/include/asm/apic.h | 2 +- arch/x86/kernel/apic/apic.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h index 1340fa53b575..2e599384abd8 100644 --- a/arch/x86/include/asm/apic.h +++ b/arch/x86/include/asm/apic.h @@ -49,7 +49,7 @@ static inline void generic_apic_probe(void) #ifdef CONFIG_X86_LOCAL_APIC -extern unsigned int apic_verbosity; +extern int apic_verbosity; extern int local_apic_timer_c2_ok; extern int disable_apic; diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 85be316665b4..1e49de432c4c 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -183,7 +183,7 @@ static __init int setup_apicpmtimer(char *s) /* * Debug level, exported for io_apic.c */ -unsigned int apic_verbosity; +int apic_verbosity; int pic_mode; -- 1.8.3.1
next reply index Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-07-08 21:36 Qian Cai [this message] 2019-07-16 21:20 ` [tip:x86/urgent] x86/apic: Silence -Wtype-limits compiler warnings tip-bot for Qian Cai
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