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lguest: use bool instead of int

Browse source 
Impact: clean up

Rusty told me, some time ago, that he had become a fan of "bool".
So, here are some replacements.

Signed-off-by: Matias Zabaljauregui <zabaljauregui at gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Matias Zabaljauregui 2009-03-18 13:38:35 -03:00 • committed by Rusty Russell
parent 4cd8b5e2a1
commit df1693abc4
5 changed files with 27 additions and 26 deletions
Download patch file Download diff file Expand all files Collapse all files

21
drivers/lguest/interrupts_and_traps.c
View file

@ -34,7 +34,7 @@ static int idt_type(u32 lo, u32 hi)
}
/* An IDT entry can't be used unless the "present" bit is set. */
static int idt_present(u32 lo, u32 hi)
static bool idt_present(u32 lo, u32 hi)
{
return (hi & 0x8000);
}
@ -60,7 +60,8 @@ static void push_guest_stack(struct lg_cpu *cpu, unsigned long *gstack, u32 val)
* We set up the stack just like the CPU does for a real interrupt, so it's
* identical for the Guest (and the standard "iret" instruction will undo
* it). */
static void set_guest_interrupt(struct lg_cpu *cpu, u32 lo, u32 hi, int has_err)
static void set_guest_interrupt(struct lg_cpu *cpu, u32 lo, u32 hi,
bool has_err)
{
unsigned long gstack, origstack;
u32 eflags, ss, irq_enable;
@ -184,7 +185,7 @@ void maybe_do_interrupt(struct lg_cpu *cpu)
/* set_guest_interrupt() takes the interrupt descriptor and a
* flag to say whether this interrupt pushes an error code onto
* the stack as well: virtual interrupts never do. */
set_guest_interrupt(cpu, idt->a, idt->b, 0);
set_guest_interrupt(cpu, idt->a, idt->b, false);
}
/* Every time we deliver an interrupt, we update the timestamp in the
@ -244,26 +245,26 @@ void free_interrupts(void)
/*H:220 Now we've got the routines to deliver interrupts, delivering traps like
* page fault is easy. The only trick is that Intel decided that some traps
* should have error codes: */
static int has_err(unsigned int trap)
static bool has_err(unsigned int trap)
{
return (trap == 8 || (trap >= 10 && trap <= 14) || trap == 17);
}
/* deliver_trap() returns true if it could deliver the trap. */
int deliver_trap(struct lg_cpu *cpu, unsigned int num)
bool deliver_trap(struct lg_cpu *cpu, unsigned int num)
{
/* Trap numbers are always 8 bit, but we set an impossible trap number
* for traps inside the Switcher, so check that here. */
if (num >= ARRAY_SIZE(cpu->arch.idt))
return 0;
return false;
/* Early on the Guest hasn't set the IDT entries (or maybe it put a
* bogus one in): if we fail here, the Guest will be killed. */
if (!idt_present(cpu->arch.idt[num].a, cpu->arch.idt[num].b))
return 0;
return false;
set_guest_interrupt(cpu, cpu->arch.idt[num].a,
cpu->arch.idt[num].b, has_err(num));
return 1;
return true;
}
/*H:250 Here's the hard part: returning to the Host every time a trap happens
@ -279,12 +280,12 @@ int deliver_trap(struct lg_cpu *cpu, unsigned int num)
*
* This routine indicates if a particular trap number could be delivered
* directly. */
static int direct_trap(unsigned int num)
static bool direct_trap(unsigned int num)
{
/* Hardware interrupts don't go to the Guest at all (except system
* call). */
if (num >= FIRST_EXTERNAL_VECTOR && !could_be_syscall(num))
return 0;
return false;
/* The Host needs to see page faults (for shadow paging and to save the
* fault address), general protection faults (in/out emulation) and