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authorTim Gardner <tim.gardner@canonical.com>2008-04-29 01:02:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-29 08:06:23 -0700
commit8c4dd6068221cd1d0d90490ace80eb4344914a8c (patch)
tree6aa1fed5d22bd315459a783616c94408c8526c89 /arch
parentd7321cd62470b70d2717dae5a963e7a8fabff4d5 (diff)
downloadop-kernel-dev-8c4dd6068221cd1d0d90490ace80eb4344914a8c.zip
op-kernel-dev-8c4dd6068221cd1d0d90490ace80eb4344914a8c.tar.gz
edd: add default mode CONFIG_EDD_OFF=n, override with edd={on,off}
Add a kernel parameter option to 'edd' to enable/disable BIOS Enhanced Disk Drive Services. CONFIG_EDD_OFF disables EDD while still compiling EDD into the kernel. Default behavior can be forced using 'edd=on' or 'edd=off' as a kernel parameter. [akpm@linux-foundation.org: fix kernel-parameters.txt] Signed-off-by: Tim Gardner <tim.gardner@canonical.com> Signed-off-by: Matt Domsch <Matt_Domsch@dell.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: "Randy.Dunlap" <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/boot/edd.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/boot/edd.c b/arch/x86/boot/edd.c
index d84a48e..03399d6 100644
--- a/arch/x86/boot/edd.c
+++ b/arch/x86/boot/edd.c
@@ -126,17 +126,25 @@ void query_edd(void)
{
char eddarg[8];
int do_mbr = 1;
+#ifdef CONFIG_EDD_OFF
+ int do_edd = 0;
+#else
int do_edd = 1;
+#endif
int be_quiet;
int devno;
struct edd_info ei, *edp;
u32 *mbrptr;
if (cmdline_find_option("edd", eddarg, sizeof eddarg) > 0) {
- if (!strcmp(eddarg, "skipmbr") || !strcmp(eddarg, "skip"))
+ if (!strcmp(eddarg, "skipmbr") || !strcmp(eddarg, "skip")) {
+ do_edd = 1;
do_mbr = 0;
+ }
else if (!strcmp(eddarg, "off"))
do_edd = 0;
+ else if (!strcmp(eddarg, "on"))
+ do_edd = 1;
}
be_quiet = cmdline_find_option_bool("quiet");
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