1 files changed, 15 insertions, 3 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 600cdd72900..fd5cac01303 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -17,6 +17,12 @@ are specified on the kernel command line with the module name plus
 
         usbcore.blinkenlights=1
 
+Hyphens (dashes) and underscores are equivalent in parameter names, so
+        log_buf_len=1M print-fatal-signals=1
+can also be entered as
+        log-buf-len=1M print_fatal_signals=1
+
+
 This document may not be entirely up to date and comprehensive. The command
 "modinfo -p ${modulename}" shows a current list of all parameters of a loadable
 module. Loadable modules, after being loaded into the running kernel, also
@@ -345,7 +351,7 @@ and is between 256 and 4096 characters. It is defined in the file
                         not play well with APC CPU idle - disable it if you have
                         APC and your system crashes randomly.
 
-        apic=           [APIC,i386] Advanced Programmable Interrupt Controller
+        apic=           [APIC,X86-32] Advanced Programmable Interrupt Controller
                         Change the output verbosity whilst booting
                         Format: { quiet (default) | verbose | debug }
                         Change the amount of debugging information output
@@ -702,7 +708,7 @@ and is between 256 and 4096 characters. It is defined in the file
                         to discrete, to make X server driver able to add WB
                         entry later. This parameter enables that.
 
-        enable_timer_pin_1 [i386,x86-64]
+        enable_timer_pin_1 [X86]
                         Enable PIN 1 of APIC timer
                         Can be useful to work around chipset bugs
                         (in particular on some ATI chipsets).
@@ -775,7 +781,7 @@ and is between 256 and 4096 characters. It is defined in the file
 
         hashdist=       [KNL,NUMA] Large hashes allocated during boot
                         are distributed across NUMA nodes.  Defaults on
-                        for IA-64, off otherwise.
+                        for 64bit NUMA, off otherwise.
                         Format: 0 | 1 (for off | on)
 
         hcl=            [IA-64] SGI's Hardware Graph compatibility layer
@@ -1529,6 +1535,10 @@ and is between 256 and 4096 characters. It is defined in the file
                         register save and restore. The kernel will only save
                         legacy floating-point registers on task switch.
 
+        noxsave         [BUGS=X86] Disables x86 extended register state save
+                        and restore using xsave. The kernel will fallback to
+                        enabling legacy floating-point and sse state.
+
         nohlt           [BUGS=ARM,SH] Tells the kernel that the sleep(SH) or
                         wfi(ARM) instruction doesn't work correctly and not to
                         use it. This is also useful when using JTAG debugger.
@@ -1620,6 +1630,8 @@ and is between 256 and 4096 characters. It is defined in the file
 
         nowb            [ARM]
 
+        nox2apic        [X86-64,APIC] Do not enable x2APIC mode.
+
         nptcg=          [IA64] Override max number of concurrent global TLB
                         purges which is reported from either PAL_VM_SUMMARY or
                         SAL PALO.