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Commit e885cd80 authored by Mark Salter's avatar Mark Salter Committed by Matt Fleming
Browse files

efi: create memory map iteration helper 



There are a lot of places in the kernel which iterate through an
EFI memory map. Most of these places use essentially the same
for-loop code. This patch adds a for_each_efi_memory_desc()
helper to clean up all of the existing duplicate code and avoid
more in the future.

Signed-off-by: default avatarMark Salter <msalter@redhat.com>
Signed-off-by: default avatarLeif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: default avatarMatt Fleming <matt.fleming@intel.com>
parent 9403e462

include/linux/efi.h

+6 −0
Original line number Original line Diff line number Diff line
@@ -863,6 +863,12 @@ extern int efi_set_rtc_mmss(const struct timespec *now); 
extern void efi_reserve_boot_services(void);

extern void efi_reserve_boot_services(void);

extern struct efi_memory_map memmap;

extern struct efi_memory_map memmap;





/* Iterate through an efi_memory_map */

#define for_each_efi_memory_desc(m, md)					   \

	for ((md) = (m)->map;						   \

	     (md) <= (efi_memory_desc_t *)((m)->map_end - (m)->desc_size); \

	     (md) = (void *)(md) + (m)->desc_size)



/**

/**

 * efi_range_is_wc - check the WC bit on an address range

 * efi_range_is_wc - check the WC bit on an address range

 * @start: starting kvirt address

 * @start: starting kvirt address