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authorMark Salter <msalter@redhat.com>2014-01-10 14:26:06 -0500
committerMark Brown <broonie@linaro.org>2014-08-08 19:21:46 +0100
commitc6a99bb2c26a0ca26bf3e732172673337ed0bc79 (patch)
parent3dce72e58d545c0e4716089ae34e0dde327aa75a (diff)
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> (cherry picked from commit e885cd805fc6e65ef5150a211c7bac02f925af04) Signed-off-by: Mark Brown <broonie@linaro.org>
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/efi.h b/include/linux/efi.h
index dc1a28bb8b8b..a50bf34c041b 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -633,6 +633,12 @@ extern void efi_reserve_boot_services(void);
extern int efi_get_fdt_params(struct efi_fdt_params *params, int verbose);
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