linux-kernel - [PATCH 3.14 29/29] efi: fix 32bit kernel boot failed problem using efi

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Date:	Sat,  8 Aug 2015 15:07:52 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Fupan Li <fupan.li@...driver.com>,
	Matt Fleming <matt.fleming@...el.com>
Subject: [PATCH 3.14 29/29] efi: fix 32bit kernel boot failed problem using efi

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Fupan Li <fupan.li@...driver.com>

Commit 35d5134b7d5a
("x86/efi: Correct EFI boot stub use of code32_start")
imported a bug, which will cause 32bit kernel boot failed
using efi method. It should use the label's address instead
of the value stored in the label to caculate the address of
code32_start.

Signed-off-by: Fupan Li <fupan.li@...driver.com>
Reviewed-by: Matt Fleming <matt.fleming@...el.com>
---
 arch/x86/boot/compressed/head_32.S |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/boot/compressed/head_32.S
+++ b/arch/x86/boot/compressed/head_32.S
@@ -54,7 +54,7 @@ ENTRY(efi_pe_entry)
 	call	reloc
 reloc:
 	popl	%ecx
-	subl	reloc, %ecx
+	subl	$reloc, %ecx
 	movl	%ecx, BP_code32_start(%eax)
 
 	sub	$0x4, %esp


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