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Commit 9210807c authored by Nicolas Pitre's avatar Nicolas Pitre Committed by Russell King
Browse files

[ARM] prevent the vmalloc cmdline argument from eating all memory 



Commit 8d5796d2 allows for the vmalloc
area to be resized from the kernel cmdline.  Make sure it cannot overlap
with RAM entirely.

Signed-off-by: default avatarNicolas Pitre <nico@marvell.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 6db015e4

arch/arm/mm/mmu.c

+7 −0
Original line number Diff line number Diff line
@@ -646,6 +646,13 @@ static void __init early_vmalloc(char **arg) 
			"vmalloc area too small, limiting to %luMB\n",

			vmalloc_reserve >> 20);

	}



	if (vmalloc_reserve > VMALLOC_END - (PAGE_OFFSET + SZ_32M)) {

		vmalloc_reserve = VMALLOC_END - (PAGE_OFFSET + SZ_32M);

		printk(KERN_WARNING

			"vmalloc area is too big, limiting to %luMB\n",

			vmalloc_reserve >> 20);

	}

}

__early_param("vmalloc=", early_vmalloc);