diff options
| author | Akinobu Mita <akinobu.mita@gmail.com> | 2009-07-19 00:11:06 +0900 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-07-19 18:27:52 +0200 |
| commit | 57594742a2b545f8f114cda34f15650be8ae976d (patch) | |
| tree | 2682b10d68f3fb33aa047fa2a3ff6db2061c0740 /arch/x86/kernel/apm_32.c | |
| parent | fde0312d01b60a3fd5dc56e69a9613defbbc7097 (diff) | |
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>
Diffstat (limited to 'arch/x86/kernel/apm_32.c')
| -rw-r--r-- | arch/x86/kernel/apm_32.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c index 79302e9a33a..b5e841bd60d 100644 --- a/arch/x86/kernel/apm_32.c +++ b/arch/x86/kernel/apm_32.c @@ -403,7 +403,7 @@ 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 const struct desc_struct bad_bios_desc = { { { 0, 0x00409200 } } }; +static struct desc_struct bad_bios_desc = { { { 0, 0x00409200 } } }; static const char driver_version[] = "1.16ac"; /* no spaces */ @@ -2337,8 +2337,8 @@ static int __init apm_init(void) * This is for buggy BIOS's that refer to (real mode) segment 0x40 * even though they are called in protected mode. */ - set_base(bad_bios_desc, __va((unsigned long)0x40 << 4)); - _set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4)); + 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 @@ -2358,12 +2358,12 @@ static int __init apm_init(void) * code to that CPU. */ gdt = get_cpu_gdt_table(0); - set_base(gdt[APM_CS >> 3], - __va((unsigned long)apm_info.bios.cseg << 4)); - set_base(gdt[APM_CS_16 >> 3], - __va((unsigned long)apm_info.bios.cseg_16 << 4)); - set_base(gdt[APM_DS >> 3], - __va((unsigned long)apm_info.bios.dseg << 4)); + set_desc_base(&gdt[APM_CS >> 3], + (unsigned long)__va((unsigned long)apm_info.bios.cseg << 4)); + set_desc_base(&gdt[APM_CS_16 >> 3], + (unsigned long)__va((unsigned long)apm_info.bios.cseg_16 << 4)); + set_desc_base(&gdt[APM_DS >> 3], + (unsigned long)__va((unsigned long)apm_info.bios.dseg << 4)); proc_create("apm", 0, NULL, &apm_file_ops); |