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authorHelge Deller <deller@parisc-linux.org>2006-01-15 14:11:50 -0500
committerKyle McMartin <kyle@duet.int.mcmartin.ca>2006-01-22 20:26:55 -0500
commit81a3de3efd61c2483a303cf0b6227525d2f28df7 (patch)
tree038a7c16bab46260fa2e9cce6890ab4e042fc332 /arch/parisc
parent1bcdd8548286743e1d6b3d53c96a90c6da975620 (diff)
[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: Helge Deller <deller@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'arch/parisc')
-rw-r--r--arch/parisc/mm/init.c9
1 files changed, 1 insertions, 8 deletions
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 6f36d0b17d9e..7847ca13d6c2 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -371,17 +371,11 @@ static void __init setup_bootmem(void)
371 371
372void free_initmem(void) 372void free_initmem(void)
373{ 373{
374 /* FIXME: */
375#if 0
376 printk(KERN_INFO "NOT FREEING INITMEM (%dk)\n",
377 (&__init_end - &__init_begin) >> 10);
378 return;
379#else
380 unsigned long addr; 374 unsigned long addr;
381 375
382 printk(KERN_INFO "Freeing unused kernel memory: "); 376 printk(KERN_INFO "Freeing unused kernel memory: ");
383 377
384#if 1 378#ifdef CONFIG_DEBUG_KERNEL
385 /* Attempt to catch anyone trying to execute code here 379 /* Attempt to catch anyone trying to execute code here
386 * by filling the page with BRK insns. 380 * by filling the page with BRK insns.
387 * 381 *
@@ -414,7 +408,6 @@ void free_initmem(void)
414 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE); 408 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE);
415 409
416 printk("%luk freed\n", (unsigned long)(&__init_end - &__init_begin) >> 10); 410 printk("%luk freed\n", (unsigned long)(&__init_end - &__init_begin) >> 10);
417#endif
418} 411}
419 412
420 413