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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-09-28 11:24:20 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-09-28 11:24:20 -0700
commitae000eec2c6aa785e1a85bea6e2f612fb826859a (patch)
tree14ffaa202799aa1e2381a05f600c702a3c19f76b
parentcdfef17d93b35a6d583509945e699ee998abce24 (diff)
parent4ee5b10abeb2b5581be10d3022694cd19084e9b0 (diff)
downloadlinux-stericsson-ae000eec2c6aa785e1a85bea6e2f612fb826859a.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-x86setup
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-x86setup: [x86 setup] Correct the SMAP check for INT 0x15, AX=0xe820
-rw-r--r--arch/i386/boot/memory.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/i386/boot/memory.c b/arch/i386/boot/memory.c
index bccaa1cf6645..378353956b5d 100644
--- a/arch/i386/boot/memory.c
+++ b/arch/i386/boot/memory.c
@@ -28,11 +28,14 @@ static int detect_memory_e820(void)
do {
size = sizeof(struct e820entry);
- id = SMAP;
+
+ /* Important: %edx is clobbered by some BIOSes,
+ so it must be either used for the error output
+ or explicitly marked clobbered. */
asm("int $0x15; setc %0"
- : "=am" (err), "+b" (next), "+d" (id), "+c" (size),
+ : "=d" (err), "+b" (next), "=a" (id), "+c" (size),
"=m" (*desc)
- : "D" (desc), "a" (0xe820));
+ : "D" (desc), "d" (SMAP), "a" (0xe820));
/* Some BIOSes stop returning SMAP in the middle of
the search loop. We don't know exactly how the BIOS