x86: Introduce set_desc_base() and set_desc_limit()

Rename set_base()/set_limit to set_desc_base()/set_desc_limit()
and rewrite them in C. These are naturally introduced by the
idea of get_desc_base()/get_desc_limit().

The conversion actually found the bug in apm_32.c:
bad_bios_desc is written at run-time, but it is defined const
variable.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
LKML-Reference: <20090718151105.GC11294@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 3 deletions

diff --git a/arch/x86/include/asm/stackprotector.h b/arch/x86/include/asm/stackprotector.h
index c2d742c6e15f..cdc5e0b126a7 100644
--- a/arch/x86/include/asm/stackprotector.h
+++ b/arch/x86/include/asm/stackprotector.h
@@ -90,9 +90,7 @@ static inline void setup_stack_canary_segment(int cpu)
         struct desc_struct desc;
 
         desc = gdt_table[GDT_ENTRY_STACK_CANARY];
-        desc.base0 = canary & 0xffff;
-        desc.base1 = (canary >> 16) & 0xff;
-        desc.base2 = (canary >> 24) & 0xff;
+        set_desc_base(&desc, canary);
         write_gdt_entry(gdt_table, GDT_ENTRY_STACK_CANARY, &desc, DESCTYPE_S);
 #endif
 }