From 3b1ff7086a9b0837d61307c34f9b8d0e88c6b587 Mon Sep 17 00:00:00 2001 From: Mark Salter Date: Fri, 10 Jan 2014 14:26:06 -0500 Subject: [PATCH] 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 Signed-off-by: Leif Lindholm Signed-off-by: Matt Fleming (cherry picked from commit e885cd805fc6e65ef5150a211c7bac02f925af04) Signed-off-by: Mark Brown --- include/linux/efi.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/efi.h b/include/linux/efi.h index b7e1ed801a7f..605bb423b9c1 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -619,6 +619,12 @@ 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 -- 2.34.1