Commit 81a3de3e authored by Helge Deller's avatar Helge Deller Committed by Kyle McMartin

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

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: default avatarHelge Deller <deller@parisc-linux.org>
Signed-off-by: default avatarKyle McMartin <kyle@parisc-linux.org>
parent 1bcdd854
......@@ -371,17 +371,11 @@ static void __init setup_bootmem(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;
printk(KERN_INFO "Freeing unused kernel memory: ");
#if 1
#ifdef CONFIG_DEBUG_KERNEL
/* Attempt to catch anyone trying to execute code here
* by filling the page with BRK insns.
*
......@@ -414,7 +408,6 @@ void free_initmem(void)
pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE);
printk("%luk freed\n", (unsigned long)(&__init_end - &__init_begin) >> 10);
#endif
}
......
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