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Fix SMP_ALTERNATIVES to cope with discarded init data.
Signed-off-by: steven.smith@cl.cam.ac.uk
This commit is contained in:
sos22@douglas.cl.cam.ac.uk committed
1 parent
b7d34829a3
commit
7f8b4ff21e
1 file changed
+10
-1
@@ -35,7 +35,7 @@ diff -Naur linux-2.6.11/arch/i386/kernel/Makefile linux-2.6.11.post/arch/i386/ke
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diff -Naur linux-2.6.11/arch/i386/kernel/smpalts.c linux-2.6.11.post/arch/i386/kernel/smpalts.c
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--- linux-2.6.11/arch/i386/kernel/smpalts.c 1970-01-01 01:00:00.000000000 +0100
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+++ linux-2.6.11.post/arch/i386/kernel/smpalts.c 2005-06-16 11:23:39.300902424 +0100
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@@ -0,0 +1,76 @@
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@@ -0,0 +1,85 @@
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+#include <linux/kernel.h>
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+#include <asm/system.h>
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+#include <asm/smp_alt.h>
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@@ -58,6 +58,7 @@ diff -Naur linux-2.6.11/arch/i386/kernel/smpalts.c linux-2.6.11.post/arch/i386/k
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+
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+extern struct smp_alternative_record __start_smp_alternatives_table,
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+ __stop_smp_alternatives_table;
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+extern unsigned long __init_begin, __init_end;
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+
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+void prepare_for_smp(void)
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+{
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@@ -69,6 +70,10 @@ diff -Naur linux-2.6.11/arch/i386/kernel/smpalts.c linux-2.6.11.post/arch/i386/k
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+ BUG_ON(r->repl->targ_size < r->repl->smp1_size);
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+ BUG_ON(r->repl->targ_size < r->repl->smp2_size);
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+ BUG_ON(r->repl->targ_size < r->repl->up_size);
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+ if (system_state == SYSTEM_RUNNING &&
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+ r->targ_start >= (void *)&__init_begin &&
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+ r->targ_start < (void *)&__init_end)
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+ continue;
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+ if (r->repl->feature != (unsigned char)-1 &&
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+ boot_cpu_has(r->repl->feature)) {
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+ memcpy(r->targ_start,
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@@ -101,6 +106,10 @@ diff -Naur linux-2.6.11/arch/i386/kernel/smpalts.c linux-2.6.11.post/arch/i386/k
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+ BUG_ON(r->repl->targ_size < r->repl->smp1_size);
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+ BUG_ON(r->repl->targ_size < r->repl->smp2_size);
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+ BUG_ON(r->repl->targ_size < r->repl->up_size);
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+ if (system_state == SYSTEM_RUNNING &&
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+ r->targ_start >= (void *)&__init_begin &&
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+ r->targ_start < (void *)&__init_end)
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+ continue;
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+ memcpy(r->targ_start,
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+ r->repl->data + r->repl->smp1_size + r->repl->smp2_size,
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+ r->repl->up_size);
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