efi/riscv: Move EFI runtime call setup/teardown helpers out of line

Only the arch_efi_call_virt() macro that some architectures override
needs to be a macro, given that it is variadic and encapsulates calls
via function pointers that have different prototypes.

The associated setup and teardown code are not special in this regard,
and don't need to be instantiated at each call site. So turn them into
ordinary C functions and move them out of line.

Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

Author: ardbiesheuvel

arch/riscv/include/asm/efi.h

@@ -21,12 +21,6 @@ extern void efi_init(void);
 int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
 int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md, bool);
 
-#define arch_efi_call_virt_setup()      ({		\
-		sync_kernel_mappings(efi_mm.pgd);	\
-		efi_virtmap_load();			\
-	})
-#define arch_efi_call_virt_teardown()   efi_virtmap_unload()
-
 #define ARCH_EFI_IRQ_FLAGS_MASK (SR_IE | SR_SPIE)
 
 /* Load initrd anywhere in system RAM */
@@ -46,8 +40,8 @@ static inline unsigned long efi_get_kimg_min_align(void)
 
 #define EFI_KIMG_PREFERRED_ADDRESS	efi_get_kimg_min_align()
 
-void efi_virtmap_load(void);
-void efi_virtmap_unload(void);
+void arch_efi_call_virt_setup(void);
+void arch_efi_call_virt_teardown(void);
 
 unsigned long stext_offset(void);
 

drivers/firmware/efi/riscv-runtime.c

@@ -130,14 +130,25 @@ static int __init riscv_enable_runtime_services(void)
 }
 early_initcall(riscv_enable_runtime_services);
 
-void efi_virtmap_load(void)
+static void efi_virtmap_load(void)
 {
 	preempt_disable();
 	switch_mm(current->active_mm, &efi_mm, NULL);
 }
 
-void efi_virtmap_unload(void)
+static void efi_virtmap_unload(void)
 {
 	switch_mm(&efi_mm, current->active_mm, NULL);
 	preempt_enable();
 }
+
+void arch_efi_call_virt_setup(void)
+{
+	sync_kernel_mappings(efi_mm.pgd);
+	efi_virtmap_load();
+}
+
+void arch_efi_call_virt_teardown(void)
+{
+	efi_virtmap_unload();
+}