tree f7d1a78787e8027b6144487580e1c811cdb4fc2a
parent 2847e3478c3d8119eedc3e0cb85a308b21f681dd
author Linus Torvalds <[EMAIL PROTECTED]> Sat, 23 Jul 2005 02:29:40 -0400
committer Linus Torvalds <[EMAIL PROTECTED]> Sat, 23 Jul 2005 02:29:40 -0400
Remove "noreplacement" kernel command line option.
It is no longer valid to not replace instructions, since we depend on
different behaviour depending on CPU capabilities.
If you need to limit the capabilities of the replacements (because the
boot CPU has features that non-boot CPU's do not have, for example), you
need to explicitly disable those capabilities that are not shared across
all CPU's.
For example, if your boot CPU has FXSR, but other CPU's in your system
do not, you need to use the "nofxsr" kernel command line, not disable
instruction replacement per se.
arch/i386/kernel/setup.c | 14 +-------------
1 files changed, 1 insertion(+), 13 deletions(-)
diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -1414,7 +1414,7 @@ static struct nop {
This runs before SMP is initialized to avoid SMP problems with
self modifying code. This implies that assymetric systems where
APs have less capabilities than the boot processor are not handled.
- In this case boot with "noreplacement". */
+ Tough. Make sure you disable such features by hand. */
void apply_alternatives(void *start, void *end)
{
struct alt_instr *a;
@@ -1442,24 +1442,12 @@ void apply_alternatives(void *start, voi
}
}
-static int no_replacement __initdata = 0;
-
void __init alternative_instructions(void)
{
extern struct alt_instr __alt_instructions[], __alt_instructions_end[];
- if (no_replacement)
- return;
apply_alternatives(__alt_instructions, __alt_instructions_end);
}
-static int __init noreplacement_setup(char *s)
-{
- no_replacement = 1;
- return 0;
-}
-
-__setup("noreplacement", noreplacement_setup);
-
static char * __init machine_specific_memory_setup(void);
#ifdef CONFIG_MCA
-
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