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authorH. Peter Anvin <hpa@zytor.com>2009-05-07 16:54:11 -0700
committerH. Peter Anvin <hpa@zytor.com>2009-05-11 17:45:06 -0700
commit5031296c57024a78ddad4edfc993367dbf4abb98 (patch)
tree7506daf7aabf25a5ec567fcd2e644fe22cd91eca /kernel
parentfe83fcc0a14dcf71996de5eb84771b2369ba7abc (diff)
x86: add extension fields for bootloader type and version
A long ago, in days of yore, it all began with a god named Thor. There were vikings and boats and some plans for a Linux kernel header. Unfortunately, a single 8-bit field was used for bootloader type and version. This has generally worked without *too* much pain, but we're getting close to flat running out of ID fields. Add extension fields for both type and version. The type will be extended if it the old field is 0xE; the version is a simple MSB extension. Keep /proc/sys/kernel/bootloader_type containing (type << 4) + (ver & 0xf) for backwards compatiblity, but also add /proc/sys/kernel/bootloader_version which contains the full version number. [ Impact: new feature to support more bootloaders ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sysctl.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index e3d2c7dd59b9..cf91c9317b26 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -729,6 +729,14 @@ static struct ctl_table kern_table[] = {
},
{
.ctl_name = CTL_UNNUMBERED,
+ .procname = "bootloader_version",
+ .data = &bootloader_version,
+ .maxlen = sizeof (int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = CTL_UNNUMBERED,
.procname = "kstack_depth_to_print",
.data = &kstack_depth_to_print,
.maxlen = sizeof(int),