Eric Lee / smarc-fsl-linux-kernel | Embedian Git Server

6e799cb69 mm/highmem: Provide and use CONFIG_DEBUG_KMAP_LOCAL ... Browse Code »

CONFIG_KMAP_LOCAL can be enabled by x86/32bit even if CONFIG_HIGHMEM is not
enabled for temporary MMIO space mappings.

Provide it as a seperate config option which depends on CONFIG_KMAP_LOCAL
and let CONFIG_DEBUG_HIGHMEM select it.

This won't increase the debug coverage of this significantly but it paves
the way to do so.

Signed-off-by: Thomas Gleixner
Acked-by: Peter Zijlstra (Intel)
Link: https://lore.kernel.org/r/20201118204006.869487226@linutronix.de

Thomas Gleixner
2020-11-24 21:42:08 +0800

kmap_size.h 263 Bytes

edit raw blame history

1 2 3 4 5 6 7 8 9 10 11 12

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_GENERIC_KMAP_SIZE_H
#define _ASM_GENERIC_KMAP_SIZE_H

/* For debug this provides guard pages between the maps */
#ifdef CONFIG_DEBUG_KMAP_LOCAL
# define KM_MAX_IDX	33
#else
# define KM_MAX_IDX	16
#endif

#endif