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| author | Tim Gardner <tim.gardner@canonical.com> | 2008-04-29 10:02:45 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 17:06:23 +0200 |
| commit | 8c4dd6068221cd1d0d90490ace80eb4344914a8c (patch) | |
| tree | 6aa1fed5d22bd315459a783616c94408c8526c89 /arch/x86 | |
| parent | sysctl: add the ->permissions callback on the ctl_table_root (diff) | |
| download | linux-8c4dd6068221cd1d0d90490ace80eb4344914a8c.tar.xz linux-8c4dd6068221cd1d0d90490ace80eb4344914a8c.zip | |
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/x86')
| -rw-r--r-- | arch/x86/boot/edd.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/x86/boot/edd.c b/arch/x86/boot/edd.c index d84a48ece785..03399d64013b 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"); |