[PATCH] x86: remove unused efi_get_time function

[PATCH] x86: remove unused efi_get_time function

[Arnd Bergmann]

Nothing calls the efi_get_time function on x86, but it does suffer
from the 32-bit time_t overflow in 2038.

This removes the function, we can always put it back in case we need
it later.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 arch/x86/platform/efi/efi.c | 15 ---------------
 include/linux/efi.h         |  1 -
 2 files changed, 16 deletions(-)

diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 56400d03409f..105e34747116 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -97,21 +97,6 @@ static efi_status_t __init phys_efi_set_virtual_address_map(
 	return status;
 }
 
-void efi_get_time(struct timespec *now)
-{
-	efi_status_t status;
-	efi_time_t eft;
-	efi_time_cap_t cap;
-
-	status = efi.get_time(&eft, &cap);
-	if (status != EFI_SUCCESS)
-		pr_err("Oops: efitime: can't read time!\n");
-
-	now->tv_sec = mktime(eft.year, eft.month, eft.day, eft.hour,
-			     eft.minute, eft.second);
-	now->tv_nsec = 0;
-}
-
 void __init efi_find_mirror(void)
 {
 	efi_memory_desc_t *md;
diff --git a/include/linux/efi.h b/include/linux/efi.h
index acb6adace01e..a402a527592f 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -975,7 +975,6 @@ extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
 extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 		struct resource *data_resource, struct resource *bss_resource);
-extern void efi_get_time(struct timespec *now);
 extern void efi_reserve_boot_services(void);
 extern int efi_get_fdt_params(struct efi_fdt_params *params);
 extern struct kobject *efi_kobj;
-- 
2.9.0

Re: [PATCH] x86: remove unused efi_get_time function

[Ard Biesheuvel]

On 17 June 2016 at 16:56, Arnd Bergmann <arnd@arndb.de> wrote:
> Nothing calls the efi_get_time function on x86, but it does suffer
> from the 32-bit time_t overflow in 2038.
>
> This removes the function, we can always put it back in case we need
> it later.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

> ---
>  arch/x86/platform/efi/efi.c | 15 ---------------
>  include/linux/efi.h         |  1 -
>  2 files changed, 16 deletions(-)
>
> diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
> index 56400d03409f..105e34747116 100644
> --- a/arch/x86/platform/efi/efi.c
> +++ b/arch/x86/platform/efi/efi.c
> @@ -97,21 +97,6 @@ static efi_status_t __init phys_efi_set_virtual_address_map(
>         return status;
>  }
>
> -void efi_get_time(struct timespec *now)
> -{
> -       efi_status_t status;
> -       efi_time_t eft;
> -       efi_time_cap_t cap;
> -
> -       status = efi.get_time(&eft, &cap);
> -       if (status != EFI_SUCCESS)
> -               pr_err("Oops: efitime: can't read time!\n");
> -
> -       now->tv_sec = mktime(eft.year, eft.month, eft.day, eft.hour,
> -                            eft.minute, eft.second);
> -       now->tv_nsec = 0;
> -}
> -
>  void __init efi_find_mirror(void)
>  {
>         efi_memory_desc_t *md;
> diff --git a/include/linux/efi.h b/include/linux/efi.h
> index acb6adace01e..a402a527592f 100644
> --- a/include/linux/efi.h
> +++ b/include/linux/efi.h
> @@ -975,7 +975,6 @@ extern u64 efi_mem_desc_end(efi_memory_desc_t *md);
>  extern int efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md);
>  extern void efi_initialize_iomem_resources(struct resource *code_resource,
>                 struct resource *data_resource, struct resource *bss_resource);
> -extern void efi_get_time(struct timespec *now);
>  extern void efi_reserve_boot_services(void);
>  extern int efi_get_fdt_params(struct efi_fdt_params *params);
>  extern struct kobject *efi_kobj;
> --
> 2.9.0
>