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Diffstat (limited to 'arch/x86/kernel/ldt.c')
-rw-r--r--arch/x86/kernel/ldt.c10
1 files changed, 1 insertions, 9 deletions
diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c
index dcbbaa165bde..c37886d759cc 100644
--- a/arch/x86/kernel/ldt.c
+++ b/arch/x86/kernel/ldt.c
@@ -20,8 +20,6 @@
#include <asm/mmu_context.h>
#include <asm/syscalls.h>
-int sysctl_ldt16 = 0;
-
#ifdef CONFIG_SMP
static void flush_ldt(void *current_mm)
{
@@ -231,16 +229,10 @@ static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
}
}
- /*
- * On x86-64 we do not support 16-bit segments due to
- * IRET leaking the high bits of the kernel stack address.
- */
-#ifdef CONFIG_X86_64
- if (!ldt_info.seg_32bit && !sysctl_ldt16) {
+ if (!IS_ENABLED(CONFIG_X86_16BIT) && !ldt_info.seg_32bit) {
error = -EINVAL;
goto out_unlock;
}
-#endif
fill_ldt(&ldt, &ldt_info);
if (oldmode)