path: root/arch/x86/realmode/rm/wakeup_asm.S
diff options
authorLinus Torvalds <>2012-10-19 14:15:16 -0700
committerLinus Torvalds <>2012-10-19 14:15:16 -0700
commit3b641bf453497d76ea28c5fc1c666f424ead6dcf (patch)
tree84dcc02681b3327afcec98481819935606ec5da3 /arch/x86/realmode/rm/wakeup_asm.S
parent4a1f2b0fba89cdb3b2b1be99a7411bfd24d61be5 (diff)
parent4533d86270d7986e00594495dde9a109d6be27ae (diff)
Merge branch 'x86/urgent' of git://
Pull miscellaneous x86 fixes from Peter Anvin: "The biggest ones are fixing suspend/resume breakage on 32 bits, and an interrim fix for mapping over holes that allows AMD kit with more than 1 TB. A final solution for the latter is in the works, but involves some fairly invasive changes that will probably mean it will only be appropriate for 3.8." * 'x86/urgent' of git:// x86, MCE: Remove bios_cmci_threshold sysfs attribute x86, amd, mce: Avoid NULL pointer reference on CPU northbridge lookup x86: Exclude E820_RESERVED regions and memory holes above 4 GB from direct mapping. x86/cache_info: Use ARRAY_SIZE() in amd_l3_attrs() x86/reboot: Remove quirk entry for SBC FITPC x86, suspend: Correct the restore of CR4, EFER; skip computing EFLAGS.ID
Diffstat (limited to 'arch/x86/realmode/rm/wakeup_asm.S')
1 files changed, 3 insertions, 12 deletions
diff --git a/arch/x86/realmode/rm/wakeup_asm.S b/arch/x86/realmode/rm/wakeup_asm.S
index e56479e5805..9e7e14797a7 100644
--- a/arch/x86/realmode/rm/wakeup_asm.S
+++ b/arch/x86/realmode/rm/wakeup_asm.S
@@ -74,18 +74,9 @@ ENTRY(wakeup_start)
lidtl wakeup_idt
- /* Clear the EFLAGS but remember if we have EFLAGS.ID */
- movl $X86_EFLAGS_ID, %ecx
- pushl %ecx
- popfl
- pushfl
- popl %edi
+ /* Clear the EFLAGS */
pushl $0
- pushfl
- popl %edx
- xorl %edx, %edi
- andl %ecx, %edi /* %edi is zero iff CPUID & %cr4 are missing */
/* Check header signature... */
movl signature, %eax
@@ -120,12 +111,12 @@ ENTRY(wakeup_start)
movl %eax, %cr3
- jz 1f
+ jnc 1f
movl pmode_cr4, %eax
movl %eax, %cr4
- jz 1f
+ jnc 1f
movl pmode_efer, %eax
movl pmode_efer + 4, %edx
movl $MSR_EFER, %ecx