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[PARISC] Use DEBUG_KERNEL to catch used-after-free __init data

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Use CONFIG_DEBUG_KERNEL to catch kernel code which tries to access
__init data after it is freed. When CONFIG_DEBUG_KERNEL is not set
this also cleans up a WARN_ON at boot time. Also remove some dead
code from mm/init.c

Signed-off-by: Helge Deller <deller@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
This commit is contained in:
Helge Deller 2006-01-15 12:11:50 -07:00 committed by Kyle McMartin
parent 1bcdd85482
commit 81a3de3efd
1 changed files with 1 additions and 8 deletions
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9
arch/parisc/mm/init.c
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@ -371,17 +371,11 @@ static void __init setup_bootmem(void)
void free_initmem(void) void free_initmem(void)
{ {
/* FIXME: */
#if 0
printk(KERN_INFO "NOT FREEING INITMEM (%dk)\n",
(&__init_end - &__init_begin) >> 10);
return;
#else
unsigned long addr; unsigned long addr;
printk(KERN_INFO "Freeing unused kernel memory: "); printk(KERN_INFO "Freeing unused kernel memory: ");
#if 1 #ifdef CONFIG_DEBUG_KERNEL
/* Attempt to catch anyone trying to execute code here /* Attempt to catch anyone trying to execute code here
* by filling the page with BRK insns. * by filling the page with BRK insns.
* *
@ -414,7 +408,6 @@ void free_initmem(void)
pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE); pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE);
printk("%luk freed\n", (unsigned long)(&__init_end - &__init_begin) >> 10); printk("%luk freed\n", (unsigned long)(&__init_end - &__init_begin) >> 10);
#endif
} }