efi/libstub: Export efi_low_alloc_above() to other units

Permit arm32-stub.c to access efi_low_alloc_above() in a subsequent
patch by giving it external linkage and declaring it in efistub.h.

Reviewed-by: Maxim Uvarov <maxim.uvarov@linaro.org>
Tested-by: Maxim Uvarov <maxim.uvarov@linaro.org>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index 85050f5..158f86f 100644 (file)
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -740,6 +740,9 @@ efi_status_t efi_allocate_pages(unsigned long size, unsigned long *addr,
 efi_status_t efi_allocate_pages_aligned(unsigned long size, unsigned long *addr,
                                        unsigned long max, unsigned long align);
 
+efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
+                                unsigned long *addr, unsigned long min);
+
 efi_status_t efi_relocate_kernel(unsigned long *image_addr,
                                 unsigned long image_size,
                                 unsigned long alloc_size,

diff --git a/drivers/firmware/efi/libstub/relocate.c b/drivers/firmware/efi/libstub/relocate.c
index 9b1aaf8..8ee9eb2 100644 (file)
--- a/drivers/firmware/efi/libstub/relocate.c
+++ b/drivers/firmware/efi/libstub/relocate.c
@@ -20,8 +20,8 @@
  *
  * Return:     status code
  */
-static efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
-                                       unsigned long *addr, unsigned long min)
+efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
+                                unsigned long *addr, unsigned long min)
 {
        unsigned long map_size, desc_size, buff_size;
        efi_memory_desc_t *map;