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Subject[PATCH v2 03/15] efi: create memory map iteration helper
Date
From: Mark Salter <msalter@redhat.com>

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: Mark Salter <msalter@redhat.com>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
---
include/linux/efi.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/include/linux/efi.h b/include/linux/efi.h
index 64d532c..a3276da 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -622,6 +622,12 @@ extern int efi_set_rtc_mmss(const struct timespec *now);
extern void efi_reserve_boot_services(void);
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
* @start: starting kvirt address
--
1.7.10.4


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