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x86: clean up ioport_32.c

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Remove unused variables, rename the "unused" argument to regp. It is used !
Codingstyle fixes.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2008-01-30 13:30:24 +01:00 committed by Ingo Molnar
parent f2f58178f4
commit 9a211abeaa
1 changed files with 8 additions and 10 deletions
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18
arch/x86/kernel/ioport_32.c
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@ -29,16 +29,14 @@ static void set_bitmap(unsigned long *bitmap, unsigned int base,
}
}
/*
* this changes the io permissions bitmap in the current task.
*/
asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
{
unsigned long i, max_long, bytes, bytes_updated;
struct thread_struct * t = &current->thread;
struct tss_struct * tss;
unsigned long *bitmap;
unsigned long i, max_long;
if ((from + num <= from) || (from + num > IO_BITMAP_BITS))
return -EINVAL;
@ -51,7 +49,8 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
* this is why we delay this operation until now:
*/
if (!t->io_bitmap_ptr) {
bitmap = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
unsigned long *bitmap = kmalloc(IO_BITMAP_BYTES, GFP_KERNEL);
if (!bitmap)
return -ENOMEM;
@ -80,10 +79,7 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
if (t->io_bitmap_ptr[i] != ~0UL)
max_long = i;
bytes = (max_long + 1) * sizeof(long);
bytes_updated = max(bytes, t->io_bitmap_max);
t->io_bitmap_max = bytes;
t->io_bitmap_max = (max_long + 1) * sizeof(unsigned long);
/*
* Sets the lazy trigger so that the next I/O operation will
@ -110,9 +106,9 @@ asmlinkage long sys_ioperm(unsigned long from, unsigned long num, int turn_on)
* code.
*/
asmlinkage long sys_iopl(unsigned long unused)
asmlinkage long sys_iopl(unsigned long regsp)
{
volatile struct pt_regs * regs = (struct pt_regs *) &unused;
volatile struct pt_regs *regs = (struct pt_regs *)&regsp;
unsigned int level = regs->ebx;
unsigned int old = (regs->eflags >> 12) & 3;
struct thread_struct *t = &current->thread;
@ -124,8 +120,10 @@ asmlinkage long sys_iopl(unsigned long unused)
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
}
t->iopl = level << 12;
regs->eflags = (regs->eflags & ~X86_EFLAGS_IOPL) | t->iopl;
set_iopl_mask(t->iopl);
return 0;
}