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Commit 48fe4a76 authored by Jan Beulich's avatar Jan Beulich Committed by H. Peter Anvin
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x86: i386: reduce boot fixmap space 



As 256 entries are needed, aligning to a 256-entry boundary is
sufficient and still guarantees the single pte table requirement.

Signed-off-by: default avatarJan Beulich <jbeulich@novell.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent 50515af2

include/asm-x86/fixmap_32.h

+3 −3
Original line number Diff line number Diff line
@@ -90,13 +90,13 @@ enum fixed_addresses { 
	 * 256 temporary boot-time mappings, used by early_ioremap(),

	 * before ioremap() is functional.

	 *

	 * We round it up to the next 512 pages boundary so that we

	 * We round it up to the next 256 pages boundary so that we

	 * can have a single pgd entry and a single pte table:

	 */

#define NR_FIX_BTMAPS		64

#define FIX_BTMAPS_NESTING	4

	FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 512 -

			(__end_of_permanent_fixed_addresses & 511),

	FIX_BTMAP_END = __end_of_permanent_fixed_addresses + 256 -

			(__end_of_permanent_fixed_addresses & 255),

	FIX_BTMAP_BEGIN = FIX_BTMAP_END + NR_FIX_BTMAPS*FIX_BTMAPS_NESTING - 1,

	FIX_WP_TEST,

#ifdef CONFIG_ACPI