x86/efi: Mark initialization code as such

The 32 bit and 64 bit implementations differ in their __init annotations
for some functions referenced from the common EFI code. Namely, the 32
bit variant is missing some of the __init annotations the 64 bit variant
has.

To solve the colliding annotations, mark the corresponding functions in
efi_32.c as initialization code, too -- as it is such.

Actually, quite a few more functions are only used during initialization
and therefore can be marked __init. They are therefore annotated, too.
Also add the __init annotation to the prototypes in the efi.h header so
users of those functions will see it's meant as initialization code
only.

This patch also fixes the "prelog" typo. ("prologue" / "epilogue" might
be more appropriate but this is C code after all, not an opera! :D)

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>

5 files changed, 24 insertions, 22 deletions

diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index ce7b1c5ff78d..abba1fe1db5e 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -81,25 +81,25 @@ extern u64 asmlinkage efi_call(void *fp, ...);
  */
 #define __efi_call_virt(f, args...) efi_call_virt(f, args)
 
-extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
-                                 u32 type, u64 attribute);
+extern void __iomem *__init efi_ioremap(unsigned long addr, unsigned long size,
+                                        u32 type, u64 attribute);
 
 #endif /* CONFIG_X86_32 */
 
 #define efi_in_nmi()    in_nmi()
 
 extern struct efi_scratch efi_scratch;
-extern void efi_set_executable(efi_memory_desc_t *md, bool executable);
-extern int efi_memblock_x86_reserve_range(void);
-extern void efi_call_phys_prelog(void);
-extern void efi_call_phys_epilog(void);
-extern void efi_unmap_memmap(void);
-extern void efi_memory_uc(u64 addr, unsigned long size);
+extern void __init efi_set_executable(efi_memory_desc_t *md, bool executable);
+extern int __init efi_memblock_x86_reserve_range(void);
+extern void __init efi_call_phys_prolog(void);
+extern void __init efi_call_phys_epilog(void);
+extern void __init efi_unmap_memmap(void);
+extern void __init efi_memory_uc(u64 addr, unsigned long size);
 extern void __init efi_map_region(efi_memory_desc_t *md);
 extern void __init efi_map_region_fixed(efi_memory_desc_t *md);
 extern void efi_sync_low_kernel_mappings(void);
-extern int efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages);
-extern void efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages);
+extern int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages);
+extern void __init efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages);
 extern void __init old_map_region(efi_memory_desc_t *md);
 extern void __init runtime_code_page_mkexec(void);
 extern void __init efi_runtime_mkexec(void);
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 1bc2c878e42e..dbc8627a5cdf 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -86,7 +86,7 @@ static efi_status_t __init phys_efi_set_virtual_address_map(
 {
         efi_status_t status;
 
-        efi_call_phys_prelog();
+        efi_call_phys_prolog();
         status = efi_call_phys(efi_phys.set_virtual_address_map,
                                memory_map_size, descriptor_size,
                                descriptor_version, virtual_map);
@@ -530,7 +530,7 @@ void __init runtime_code_page_mkexec(void)
         }
 }
 
-void efi_memory_uc(u64 addr, unsigned long size)
+void __init efi_memory_uc(u64 addr, unsigned long size)
 {
         unsigned long page_shift = 1UL << EFI_PAGE_SHIFT;
         u64 npages;
diff --git a/arch/x86/platform/efi/efi_32.c b/arch/x86/platform/efi/efi_32.c
index 9ee3491e31fb..40e7cda52936 100644
--- a/arch/x86/platform/efi/efi_32.c
+++ b/arch/x86/platform/efi/efi_32.c
@@ -33,7 +33,7 @@
 
 /*
  * To make EFI call EFI runtime service in physical addressing mode we need
- * prelog/epilog before/after the invocation to disable interrupt, to
+ * prolog/epilog before/after the invocation to disable interrupt, to
  * claim EFI runtime service handler exclusively and to duplicate a memory in
  * low memory space say 0 - 3G.
  */
@@ -41,11 +41,13 @@ static unsigned long efi_rt_eflags;
 
 void efi_sync_low_kernel_mappings(void) {}
 void __init efi_dump_pagetable(void) {}
-int efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
+int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
 {
         return 0;
 }
-void efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages) {}
+void __init efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages)
+{
+}
 
 void __init efi_map_region(efi_memory_desc_t *md)
 {
@@ -55,7 +57,7 @@ void __init efi_map_region(efi_memory_desc_t *md)
 void __init efi_map_region_fixed(efi_memory_desc_t *md) {}
 void __init parse_efi_setup(u64 phys_addr, u32 data_len) {}
 
-void efi_call_phys_prelog(void)
+void __init efi_call_phys_prolog(void)
 {
         struct desc_ptr gdt_descr;
 
@@ -69,7 +71,7 @@ void efi_call_phys_prelog(void)
         load_gdt(&gdt_descr);
 }
 
-void efi_call_phys_epilog(void)
+void __init efi_call_phys_epilog(void)
 {
         struct desc_ptr gdt_descr;
 
diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
index 290d397e1dd9..35aecb6042fb 100644
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -79,7 +79,7 @@ static void __init early_code_mapping_set_exec(int executable)
         }
 }
 
-void __init efi_call_phys_prelog(void)
+void __init efi_call_phys_prolog(void)
 {
         unsigned long vaddress;
         int pgd;
@@ -139,7 +139,7 @@ void efi_sync_low_kernel_mappings(void)
                 sizeof(pgd_t) * num_pgds);
 }
 
-int efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
+int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
 {
         unsigned long text;
         struct page *page;
@@ -192,7 +192,7 @@ int efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
         return 0;
 }
 
-void efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages)
+void __init efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages)
 {
         pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd);
 
diff --git a/arch/x86/platform/efi/efi_stub_32.S b/arch/x86/platform/efi/efi_stub_32.S
index fbe66e626c09..040192b50d02 100644
--- a/arch/x86/platform/efi/efi_stub_32.S
+++ b/arch/x86/platform/efi/efi_stub_32.S
@@ -27,13 +27,13 @@ ENTRY(efi_call_phys)
          * set to 0x0010, DS and SS have been set to 0x0018. In EFI, I found
          * the values of these registers are the same. And, the corresponding
          * GDT entries are identical. So I will do nothing about segment reg
-         * and GDT, but change GDT base register in prelog and epilog.
+         * and GDT, but change GDT base register in prolog and epilog.
          */
 
         /*
          * 1. Now I am running with EIP = <physical address> + PAGE_OFFSET.
          * But to make it smoothly switch from virtual mode to flat mode.
-         * The mapping of lower virtual memory has been created in prelog and
+         * The mapping of lower virtual memory has been created in prolog and
          * epilog.
          */
         movl    $1f, %edx