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Commit a7bd1daf authored by Naga Chumbalkar's avatar Naga Chumbalkar Committed by Ingo Molnar
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x86: Don't check for BIOS corruption in first 64K when there's no need to 



Due to commit 781c5a67 it is
likely that the number of areas to scan for BIOS corruption is 0
 -- especially when the first 64K is already reserved
(X86_RESERVE_LOW is 64K by default).

If that's the case then don't set up the scan.

Signed-off-by: default avatarNaga Chumbalkar <nagananda.chumbalkar@hp.com>
Cc: <stable@kernel.org>
LKML-Reference: <20110225202838.2229.71011.sendpatchset@nchumbalkar.americas.hpqcorp.net>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 54712622

arch/x86/kernel/check.c

+4 −4
Original line number Diff line number Diff line
@@ -106,8 +106,8 @@ void __init setup_bios_corruption_check(void) 
		addr += size;

	}



	printk(KERN_INFO "Scanning %d areas for low memory corruption\n",

	       num_scan_areas);

	if (num_scan_areas)

		printk(KERN_INFO "Scanning %d areas for low memory corruption\n", num_scan_areas);

}
@@ -148,7 +148,7 @@ static void check_corruption(struct work_struct *dummy) 


static int start_periodic_check_for_corruption(void)

{

	if (!memory_corruption_check || corruption_check_period == 0)

	if (!num_scan_areas || !memory_corruption_check || corruption_check_period == 0)

		return 0;



	printk(KERN_INFO "Scanning for low memory corruption every %d seconds\n",