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| author |   Takashi Iwai <tiwai@suse.de> | 2017-12-20 17:36:04 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-12-20 17:36:04 +0100 |
| commit | 1e9a328e4b35af22c23ce9357c2c2a77159e74bb (patch) | |
| tree | d04364bc2f892e1db6a4ec0edaccfbb782acd243 /arch/x86/boot/compressed/head_64.S | |
| parent | ALSA: usb-audio: Fix the missing ctl name suffix at parsing SU (diff) | |
| parent | Merge remote-tracking branches 'asoc/fix/rt5663', 'asoc/fix/tlv320aic31xx' and 'asoc/fix/twl4030' into asoc-linus (diff) | |
| download | linux-dev-1e9a328e4b35af22c23ce9357c2c2a77159e74bb.tar.xz linux-dev-1e9a328e4b35af22c23ce9357c2c2a77159e74bb.zip | |
Merge tag 'asoc-fix-v4.15-rc4' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v4.15
This is a fairly large set of fixes, they've been delayed partly as more
and more keep coming in. Most of them are very small driver specific
fixes, the biggest individual thing is the revert of the rcar IOMMU
support - it was causing problems and there wasn't the confidence that
it could be resolved sensibly. There's also a relatively large change
in the Freescale SSI controller which resolves some issues with the
AC'97 mode, these aren't that large in the grand scheme of things and
reflect some fairly thorough review and testing.
Diffstat (limited to 'arch/x86/boot/compressed/head_64.S')
| -rw-r--r-- | arch/x86/boot/compressed/head_64.S | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index 20919b4f3133..fc313e29fe2c 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -305,10 +305,18 @@ ENTRY(startup_64) leaq boot_stack_end(%rbx), %rsp #ifdef CONFIG_X86_5LEVEL - /* Check if 5-level paging has already enabled */ - movq %cr4, %rax - testl $X86_CR4_LA57, %eax - jnz lvl5 + /* + * Check if we need to enable 5-level paging. + * RSI holds real mode data and need to be preserved across + * a function call. + */ + pushq %rsi + call l5_paging_required + popq %rsi + + /* If l5_paging_required() returned zero, we're done here. */ + cmpq $0, %rax + je lvl5 /* * At this point we are in long mode with 4-level paging enabled, |