summaryrefslogtreecommitdiff
path: root/arch/x86/kernel/apm_32.c
diff options
context:
space:
mode:
authorAkinobu Mita <akinobu.mita@gmail.com>2009-08-09 17:03:52 +0900
committerIngo Molnar <mingo@elte.hu>2009-08-10 11:10:52 +0200
commitc7425314c755d5f94da7c978205c85a7c6201212 (patch)
treeef0e1152756a6e113a6d6b0cebc53b263eb78974 /arch/x86/kernel/apm_32.c
parent4c711576b90cc36c13b94816a953a8de6a53d03c (diff)
x86: Introduce GDT_ENTRY_INIT(), initialize bad_bios_desc statically
Fully initialize bad_bios_desc statically instead of doing some fields statically and some dynamically. Suggested-by: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> LKML-Reference: <20090809080350.GA4765@localhost.localdomain> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/apm_32.c')
-rw-r--r--arch/x86/kernel/apm_32.c19
1 files changed, 9 insertions, 10 deletions
diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index febb2dab254f..39a4462ef8a7 100644
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -403,7 +403,15 @@ static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
static struct apm_user *user_list;
static DEFINE_SPINLOCK(user_list_lock);
-static struct desc_struct bad_bios_desc = GDT_ENTRY_INIT(0x4092, 0, 0);
+
+/*
+ * Set up a segment that references the real mode segment 0x40
+ * that extends up to the end of page zero (that we have reserved).
+ * This is for buggy BIOS's that refer to (real mode) segment 0x40
+ * even though they are called in protected mode.
+ */
+static struct desc_struct bad_bios_desc = GDT_ENTRY_INIT(0x4092,
+ (unsigned long)__va(0x400UL), PAGE_SIZE - 0x400 - 1);
static const char driver_version[] = "1.16ac"; /* no spaces */
@@ -2332,15 +2340,6 @@ static int __init apm_init(void)
pm_flags |= PM_APM;
/*
- * Set up a segment that references the real mode segment 0x40
- * that extends up to the end of page zero (that we have reserved).
- * This is for buggy BIOS's that refer to (real mode) segment 0x40
- * even though they are called in protected mode.
- */
- set_desc_base(&bad_bios_desc, (unsigned long)__va(0x40UL << 4));
- set_desc_limit(&bad_bios_desc, 4095 - (0x40 << 4));
-
- /*
* Set up the long jump entry point to the APM BIOS, which is called
* from inline assembly.
*/