x86/reboot: Clean up coding style
This commit simply cleans up the style used in this file to fall in line with what's specified in CodingStyle. Mostly comment changes, with a single removal of unneeded braces. Note that the comments for all the DMI quirks in reboot_dmi_table now all line up consistently using tabs instead of spaces. Signed-off-by: Michael D Labriola <michael.d.labriola@gmail.com> Link: http://lkml.kernel.org/n/tip-lde9yy7qsomh0sdqevn7xp56@git.kernel.org [ Fixed a few small details. ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Michael D Labriola
Ingo Molnar
parent
57b165948f
commit
144d102b92
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@ -39,7 +39,8 @@ static int reboot_mode;
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enum reboot_type reboot_type = BOOT_ACPI;
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int reboot_force;
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/* This variable is used privately to keep track of whether or not
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/*
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* This variable is used privately to keep track of whether or not
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* reboot_type is still set to its default value (i.e., reboot= hasn't
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* been set on the command line). This is needed so that we can
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* suppress DMI scanning for reboot quirks. Without it, it's
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@ -51,7 +52,8 @@ static int reboot_default = 1;
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static int reboot_cpu = -1;
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#endif
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/* This is set if we need to go through the 'emergency' path.
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/*
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* This is set if we need to go through the 'emergency' path.
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* When machine_emergency_restart() is called, we may be on
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* an inconsistent state and won't be able to do a clean cleanup
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*/
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@ -60,22 +62,24 @@ static int reboot_emergency;
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/* This is set by the PCI code if either type 1 or type 2 PCI is detected */
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bool port_cf9_safe = false;
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/* reboot=b[ios] | s[mp] | t[riple] | k[bd] | e[fi] [, [w]arm | [c]old] | p[ci]
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warm Don't set the cold reboot flag
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cold Set the cold reboot flag
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bios Reboot by jumping through the BIOS (only for X86_32)
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smp Reboot by executing reset on BSP or other CPU (only for X86_32)
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triple Force a triple fault (init)
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kbd Use the keyboard controller. cold reset (default)
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acpi Use the RESET_REG in the FADT
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efi Use efi reset_system runtime service
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pci Use the so-called "PCI reset register", CF9
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force Avoid anything that could hang.
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/*
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* reboot=b[ios] | s[mp] | t[riple] | k[bd] | e[fi] [, [w]arm | [c]old] | p[ci]
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* warm Don't set the cold reboot flag
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* cold Set the cold reboot flag
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* bios Reboot by jumping through the BIOS (only for X86_32)
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* smp Reboot by executing reset on BSP or other CPU (only for X86_32)
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* triple Force a triple fault (init)
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* kbd Use the keyboard controller. cold reset (default)
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* acpi Use the RESET_REG in the FADT
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* efi Use efi reset_system runtime service
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* pci Use the so-called "PCI reset register", CF9
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* force Avoid anything that could hang.
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*/
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static int __init reboot_setup(char *str)
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{
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for (;;) {
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/* Having anything passed on the command line via
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/*
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* Having anything passed on the command line via
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* reboot= will cause us to disable DMI checking
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* below.
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*/
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@ -98,9 +102,11 @@ static int __init reboot_setup(char *str)
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if (isdigit(*(str+2)))
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reboot_cpu = reboot_cpu*10 + (int)(*(str+2) - '0');
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}
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/* we will leave sorting out the final value
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when we are ready to reboot, since we might not
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have detected BSP APIC ID or smp_num_cpu */
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/*
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* We will leave sorting out the final value
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* when we are ready to reboot, since we might not
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* have detected BSP APIC ID or smp_num_cpu
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*/
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break;
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#endif /* CONFIG_SMP */
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@ -162,14 +168,15 @@ void machine_real_restart(unsigned int type)
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local_irq_disable();
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/* Write zero to CMOS register number 0x0f, which the BIOS POST
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routine will recognize as telling it to do a proper reboot. (Well
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that's what this book in front of me says -- it may only apply to
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the Phoenix BIOS though, it's not clear). At the same time,
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disable NMIs by setting the top bit in the CMOS address register,
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as we're about to do peculiar things to the CPU. I'm not sure if
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`outb_p' is needed instead of just `outb'. Use it to be on the
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safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.)
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/*
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* Write zero to CMOS register number 0x0f, which the BIOS POST
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* routine will recognize as telling it to do a proper reboot. (Well
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* that's what this book in front of me says -- it may only apply to
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* the Phoenix BIOS though, it's not clear). At the same time,
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* disable NMIs by setting the top bit in the CMOS address register,
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* as we're about to do peculiar things to the CPU. I'm not sure if
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* `outb_p' is needed instead of just `outb'. Use it to be on the
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* safe side. (Yes, CMOS_WRITE does outb_p's. - Paul G.)
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*/
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spin_lock(&rtc_lock);
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CMOS_WRITE(0x00, 0x8f);
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@ -180,11 +187,12 @@ void machine_real_restart(unsigned int type)
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*/
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load_cr3(initial_page_table);
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/* Write 0x1234 to absolute memory location 0x472. The BIOS reads
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this on booting to tell it to "Bypass memory test (also warm
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boot)". This seems like a fairly standard thing that gets set by
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REBOOT.COM programs, and the previous reset routine did this
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too. */
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/*
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* Write 0x1234 to absolute memory location 0x472. The BIOS reads
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* this on booting to tell it to "Bypass memory test (also warm
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* boot)". This seems like a fairly standard thing that gets set by
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* REBOOT.COM programs, and the previous reset routine did this
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* too. */
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*((unsigned short *)0x472) = reboot_mode;
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/* Patch the GDT in the low memory trampoline */
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@ -233,7 +241,8 @@ static int __init set_kbd_reboot(const struct dmi_system_id *d)
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return 0;
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}
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/* This is a single dmi_table handling all reboot quirks. Note that
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/*
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* This is a single dmi_table handling all reboot quirks. Note that
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* REBOOT_BIOS is only available for 32bit
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*/
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static struct dmi_system_id __initdata reboot_dmi_table[] = {
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@ -262,7 +271,7 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
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DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge 300/"),
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},
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},
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{ /* Handle problems with rebooting on Dell Optiplex 745's SFF*/
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{ /* Handle problems with rebooting on Dell Optiplex 745's SFF */
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.callback = set_bios_reboot,
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.ident = "Dell OptiPlex 745",
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.matches = {
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@ -270,7 +279,7 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
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DMI_MATCH(DMI_PRODUCT_NAME, "OptiPlex 745"),
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},
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},
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{ /* Handle problems with rebooting on Dell Optiplex 745's DFF*/
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{ /* Handle problems with rebooting on Dell Optiplex 745's DFF */
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.callback = set_bios_reboot,
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.ident = "Dell OptiPlex 745",
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.matches = {
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@ -306,7 +315,7 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
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DMI_MATCH(DMI_BOARD_NAME, "0T656F"),
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},
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},
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{ /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G*/
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{ /* Handle problems with rebooting on Dell OptiPlex 760 with 0G919G */
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.callback = set_bios_reboot,
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.ident = "Dell OptiPlex 760",
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.matches = {
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@ -466,12 +475,12 @@ static struct dmi_system_id __initdata reboot_dmi_table[] = {
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static int __init reboot_init(void)
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{
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/* Only do the DMI check if reboot_type hasn't been overridden
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/*
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* Only do the DMI check if reboot_type hasn't been overridden
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* on the command line
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*/
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if (reboot_default) {
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if (reboot_default)
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dmi_check_system(reboot_dmi_table);
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}
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return 0;
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}
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core_initcall(reboot_init);
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@ -492,14 +501,14 @@ static void vmxoff_nmi(int cpu, struct pt_regs *regs)
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cpu_emergency_vmxoff();
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}
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/* Use NMIs as IPIs to tell all CPUs to disable virtualization
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*/
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/* Use NMIs as IPIs to tell all CPUs to disable virtualization */
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static void emergency_vmx_disable_all(void)
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{
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/* Just make sure we won't change CPUs while doing this */
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local_irq_disable();
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/* We need to disable VMX on all CPUs before rebooting, otherwise
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/*
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* We need to disable VMX on all CPUs before rebooting, otherwise
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* we risk hanging up the machine, because the CPU ignore INIT
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* signals when VMX is enabled.
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*
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@ -518,8 +527,7 @@ static void emergency_vmx_disable_all(void)
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* is still enabling VMX.
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*/
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if (cpu_has_vmx() && cpu_vmx_enabled()) {
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/* Disable VMX on this CPU.
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*/
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/* Disable VMX on this CPU. */
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cpu_vmxoff();
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/* Halt and disable VMX on the other CPUs */
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@ -564,12 +572,12 @@ static void native_machine_emergency_restart(void)
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/* Could also try the reset bit in the Hammer NB */
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switch (reboot_type) {
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case BOOT_KBD:
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mach_reboot_fixups(); /* for board specific fixups */
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mach_reboot_fixups(); /* For board specific fixups */
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for (i = 0; i < 10; i++) {
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kb_wait();
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udelay(50);
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outb(0xfe, 0x64); /* pulse reset low */
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outb(0xfe, 0x64); /* Pulse reset low */
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udelay(50);
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}
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if (attempt == 0 && orig_reboot_type == BOOT_ACPI) {
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@ -611,7 +619,7 @@ static void native_machine_emergency_restart(void)
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case BOOT_CF9:
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port_cf9_safe = true;
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/* fall through */
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/* Fall through */
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case BOOT_CF9_COND:
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if (port_cf9_safe) {
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@ -649,7 +657,8 @@ void native_machine_shutdown(void)
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/* Make certain I only run on the appropriate processor */
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set_cpus_allowed_ptr(current, cpumask_of(reboot_cpu_id));
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/* O.K Now that I'm on the appropriate processor,
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/*
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* O.K Now that I'm on the appropriate processor,
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* stop all of the others.
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*/
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stop_other_cpus();
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@ -687,12 +696,11 @@ static void native_machine_restart(char *__unused)
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static void native_machine_halt(void)
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{
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/* stop other cpus and apics */
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/* Stop other cpus and apics */
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machine_shutdown();
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tboot_shutdown(TB_SHUTDOWN_HALT);
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/* stop this cpu */
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stop_this_cpu(NULL);
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}
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@ -703,7 +711,7 @@ static void native_machine_power_off(void)
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machine_shutdown();
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pm_power_off();
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}
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/* a fallback in case there is no PM info available */
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/* A fallback in case there is no PM info available */
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tboot_shutdown(TB_SHUTDOWN_HALT);
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}
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@ -765,7 +773,8 @@ static int crash_nmi_callback(unsigned int val, struct pt_regs *regs)
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cpu = raw_smp_processor_id();
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/* Don't do anything if this handler is invoked on crashing cpu.
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/*
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* Don't do anything if this handler is invoked on crashing cpu.
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* Otherwise, system will completely hang. Crashing cpu can get
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* an NMI if system was initially booted with nmi_watchdog parameter.
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*/
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@ -789,7 +798,8 @@ static void smp_send_nmi_allbutself(void)
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apic->send_IPI_allbutself(NMI_VECTOR);
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}
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/* Halt all other CPUs, calling the specified function on each of them
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/*
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* Halt all other CPUs, calling the specified function on each of them
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*
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* This function can be used to halt all other CPUs on crash
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* or emergency reboot time. The function passed as parameter
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@ -800,7 +810,7 @@ void nmi_shootdown_cpus(nmi_shootdown_cb callback)
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unsigned long msecs;
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local_irq_disable();
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/* Make a note of crashing cpu. Will be used in NMI callback.*/
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/* Make a note of crashing cpu. Will be used in NMI callback. */
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crashing_cpu = safe_smp_processor_id();
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shootdown_callback = callback;
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@ -809,8 +819,9 @@ void nmi_shootdown_cpus(nmi_shootdown_cb callback)
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/* Would it be better to replace the trap vector here? */
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if (register_nmi_handler(NMI_LOCAL, crash_nmi_callback,
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NMI_FLAG_FIRST, "crash"))
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return; /* return what? */
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/* Ensure the new callback function is set before sending
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return; /* Return what? */
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/*
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* Ensure the new callback function is set before sending
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* out the NMI
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*/
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wmb();
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