diff options
| author | Roland McGrath <roland@redhat.com> | 2008-01-30 13:30:44 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:30:44 +0100 |
| commit | 859c0a5b9ca8eba2d65fa42f02505d76f8a712c7 (patch) | |
| tree | b0956c5934213c443d8ad96394f7188368d8aa0d /include | |
| parent | cadd516422d9382313144aa58f9e46ee7a2c0a28 (diff) | |
x86: get_desc_base
This defines the get_desc_base function in asm-x86/desc_64.h to match the
one in desc_32.h. If these two files ever get merged together, this
function could be the same in both.
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-x86/desc_64.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h index 7d48df72aef2..230ac6e50a0f 100644 --- a/include/asm-x86/desc_64.h +++ b/include/asm-x86/desc_64.h @@ -215,6 +215,16 @@ static inline void load_LDT(mm_context_t *pc) extern struct desc_ptr idt_descr; +static inline unsigned long get_desc_base(const void *ptr) +{ + const u32 *desc = ptr; + unsigned long base; + base = ((desc[0] >> 16) & 0x0000ffff) | + ((desc[1] << 16) & 0x00ff0000) | + (desc[1] & 0xff000000); + return base; +} + #endif /* !__ASSEMBLY__ */ #endif |