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authorMark Salter <msalter@redhat.com>2014-01-10 23:26:06 +0400
committerMatt Fleming <matt.fleming@intel.com>2014-04-14 20:49:37 +0400
commite885cd805fc6e65ef5150a211c7bac02f925af04 (patch)
treed11d57427c15bd5210f8d2b4d34c71566d489484 /include/linux/efi.h
parent9403e462fb5ffa9eeaa9663cb23ded02b7e603a3 (diff)
downloadlinux-e885cd805fc6e65ef5150a211c7bac02f925af04.tar.xz
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: Mark Salter <msalter@redhat.com> Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'include/linux/efi.h')
-rw-r--r--include/linux/efi.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 6c100ff0cae4..82d0abb2b19f 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -863,6 +863,12 @@ 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