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authorThomas Gleixner <tglx@linutronix.de>2009-05-01 20:59:25 +0200
committerThomas Gleixner <tglx@linutronix.de>2009-05-01 21:09:53 +0200
commitf9a196b8dceba3c1e5fe885b81e45043ad7c60fc (patch)
tree737d05ec2e46c16f191a919ebc2545911425c420 /arch
parent2f65dd475c6a8a997145ea83cc3d2d5e6dc55af1 (diff)
x86: initialize io_bitmap_base on 32bit
commit db949bba3c7cf2e664ac12e237c6d4c914f0c69d (x86-32: use non-lazy io bitmap context switching) broke ioperm for 32bit because it removed the lazy initialization of io_bitmap_base and did not set it to the real bitmap offset. [ Impact: fix non-working sys_ioperm() on 32-bit kernels ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/cpu/common.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index c4f667896c2..c1caefc82e6 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1203,6 +1203,8 @@ void __cpuinit cpu_init(void)
load_TR_desc();
load_LDT(&init_mm.context);
+ t->x86_tss.io_bitmap_base = offsetof(struct tss_struct, io_bitmap);
+
#ifdef CONFIG_DOUBLEFAULT
/* Set up doublefault TSS pointer in the GDT */
__set_tss_desc(cpu, GDT_ENTRY_DOUBLEFAULT_TSS, &doublefault_tss);