diff options
| -rw-r--r-- | arch/x86_64/kernel/setup.c | 47 |
1 files changed, 25 insertions, 22 deletions
diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c index 6ca07eaa26db..01e2de4d2540 100644 --- a/arch/x86_64/kernel/setup.c +++ b/arch/x86_64/kernel/setup.c @@ -46,6 +46,7 @@ #include <linux/cpufreq.h> #include <linux/dmi.h> #include <linux/dma-mapping.h> +#include <linux/ctype.h> #include <asm/mtrr.h> #include <asm/uaccess.h> @@ -270,6 +271,13 @@ static void __init probe_roms(void) } } +/* Check for full argument with no trailing characters */ +static int fullarg(char *p, char *arg) +{ + int l = strlen(arg); + return !memcmp(p, arg, l) && (p[l] == 0 || isspace(p[l])); +} + static __init void parse_cmdline_early (char ** cmdline_p) { char c = ' ', *to = command_line, *from = COMMAND_LINE; @@ -293,10 +301,10 @@ static __init void parse_cmdline_early (char ** cmdline_p) #endif #ifdef CONFIG_ACPI /* "acpi=off" disables both ACPI table parsing and interpreter init */ - if (!memcmp(from, "acpi=off", 8)) + if (fullarg(from,"acpi=off")) disable_acpi(); - if (!memcmp(from, "acpi=force", 10)) { + if (fullarg(from, "acpi=force")) { /* add later when we do DMI horrors: */ acpi_force = 1; acpi_disabled = 0; @@ -304,52 +312,47 @@ static __init void parse_cmdline_early (char ** cmdline_p) /* acpi=ht just means: do ACPI MADT parsing at bootup, but don't enable the full ACPI interpreter */ - if (!memcmp(from, "acpi=ht", 7)) { + if (fullarg(from, "acpi=ht")) { if (!acpi_force) disable_acpi(); acpi_ht = 1; } - else if (!memcmp(from, "pci=noacpi", 10)) + else if (fullarg(from, "pci=noacpi")) acpi_disable_pci(); - else if (!memcmp(from, "acpi=noirq", 10)) + else if (fullarg(from, "acpi=noirq")) acpi_noirq_set(); - else if (!memcmp(from, "acpi_sci=edge", 13)) + else if (fullarg(from, "acpi_sci=edge")) acpi_sci_flags.trigger = 1; - else if (!memcmp(from, "acpi_sci=level", 14)) + else if (fullarg(from, "acpi_sci=level")) acpi_sci_flags.trigger = 3; - else if (!memcmp(from, "acpi_sci=high", 13)) + else if (fullarg(from, "acpi_sci=high")) acpi_sci_flags.polarity = 1; - else if (!memcmp(from, "acpi_sci=low", 12)) + else if (fullarg(from, "acpi_sci=low")) acpi_sci_flags.polarity = 3; /* acpi=strict disables out-of-spec workarounds */ - else if (!memcmp(from, "acpi=strict", 11)) { + else if (fullarg(from, "acpi=strict")) { acpi_strict = 1; } #ifdef CONFIG_X86_IO_APIC - else if (!memcmp(from, "acpi_skip_timer_override", 24)) + else if (fullarg(from, "acpi_skip_timer_override")) acpi_skip_timer_override = 1; #endif #endif - if (!memcmp(from, "disable_timer_pin_1", 19)) + if (fullarg(from, "disable_timer_pin_1")) disable_timer_pin_1 = 1; - if (!memcmp(from, "enable_timer_pin_1", 18)) + if (fullarg(from, "enable_timer_pin_1")) disable_timer_pin_1 = -1; - if (!memcmp(from, "nolapic", 7) || - !memcmp(from, "disableapic", 11)) + if (fullarg(from, "nolapic") || fullarg(from, "disableapic")) disable_apic = 1; - /* Don't confuse with noapictimer */ - if (!memcmp(from, "noapic", 6) && - (from[6] == ' ' || from[6] == 0)) + if (fullarg(from, "noapic")) skip_ioapic_setup = 1; - /* Make sure to not confuse with apic= */ - if (!memcmp(from, "apic", 4) && - (from[4] == ' ' || from[4] == 0)) { + if (fullarg(from,"apic")) { skip_ioapic_setup = 0; ioapic_force = 1; } @@ -388,7 +391,7 @@ static __init void parse_cmdline_early (char ** cmdline_p) iommu_setup(from+6); } - if (!memcmp(from,"oops=panic", 10)) + if (fullarg(from,"oops=panic")) panic_on_oops = 1; if (!memcmp(from, "noexec=", 7)) |