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x86: desc_empty

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This replaces the desc_empty macro with an inline.  It now handles
easily any of the four different types used between 32/64 code to
refer to these 8 bytes.  It's identical in both asm-x86/processor_64.h
and asm-x86/processor_32.h, so if these files ever get merged this
function can be in the common code.

This also removes the desc_equal macro because nothing uses it.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Roland McGrath 2008-01-30 13:30:45 +01:00 committed by Ingo Molnar
parent df5d438e33
commit 12c3cbbb7e
2 changed files with 10 additions and 9 deletions
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9
include/asm-x86/processor_32.h
View File

@ -28,11 +28,12 @@ struct desc_struct {
unsigned long a,b;
};
#define desc_empty(desc) \
(!((desc)->a | (desc)->b))
static inline int desc_empty(const void *ptr)
{
const u32 *desc = ptr;
return !(desc[0] | desc[1]);
}
#define desc_equal(desc1, desc2) \
(((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b))
/*
* Default implementation of macro that returns current
* instruction pointer ("program counter").

10
include/asm-x86/processor_64.h
View File

@ -30,11 +30,11 @@
#define VIP_MASK 0x00100000 /* virtual interrupt pending */
#define ID_MASK 0x00200000
#define desc_empty(desc) \
(!((desc)->a | (desc)->b))
#define desc_equal(desc1, desc2) \
(((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b))
static inline int desc_empty(const void *ptr)
{
const u32 *desc = ptr;
return !(desc[0] | desc[1]);
}
/*
* Default implementation of macro that returns current