[Xen-devel] [PATCH 2/2] x86/xen/efi: Init only efi struct members used by Xen

[Daniel Kiper <daniel.kiper@xxxxxxxxxx>]

Current approach, wholesale efi struct initialization from efi_xen, is not
good. Usually if new member is defined then it is properly initialized in
drivers/firmware/efi/efi.c but not in arch/x86/xen/efi.c. As I saw it happened
a few times until now. So, let's initialize only efi struct members used by
Xen to avoid such issues in the future.

Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
---
 arch/x86/xen/efi.c |   45 ++++++++++++---------------------------------
 1 file changed, 12 insertions(+), 33 deletions(-)

diff --git a/arch/x86/xen/efi.c b/arch/x86/xen/efi.c
index 30bb2e8..01b9faf 100644
--- a/arch/x86/xen/efi.c
+++ b/arch/x86/xen/efi.c
@@ -54,38 +54,6 @@
        .tables         = EFI_INVALID_TABLE_ADDR  /* Initialized later. */
 };
 
-static const struct efi efi_xen __initconst = {
-       .systab                   = NULL, /* Initialized later. */
-       .runtime_version          = 0,    /* Initialized later. */
-       .mps                      = EFI_INVALID_TABLE_ADDR,
-       .acpi                     = EFI_INVALID_TABLE_ADDR,
-       .acpi20                   = EFI_INVALID_TABLE_ADDR,
-       .smbios                   = EFI_INVALID_TABLE_ADDR,
-       .smbios3                  = EFI_INVALID_TABLE_ADDR,
-       .sal_systab               = EFI_INVALID_TABLE_ADDR,
-       .boot_info                = EFI_INVALID_TABLE_ADDR,
-       .hcdp                     = EFI_INVALID_TABLE_ADDR,
-       .uga                      = EFI_INVALID_TABLE_ADDR,
-       .uv_systab                = EFI_INVALID_TABLE_ADDR,
-       .fw_vendor                = EFI_INVALID_TABLE_ADDR,
-       .runtime                  = EFI_INVALID_TABLE_ADDR,
-       .config_table             = EFI_INVALID_TABLE_ADDR,
-       .get_time                 = xen_efi_get_time,
-       .set_time                 = xen_efi_set_time,
-       .get_wakeup_time          = xen_efi_get_wakeup_time,
-       .set_wakeup_time          = xen_efi_set_wakeup_time,
-       .get_variable             = xen_efi_get_variable,
-       .get_next_variable        = xen_efi_get_next_variable,
-       .set_variable             = xen_efi_set_variable,
-       .query_variable_info      = xen_efi_query_variable_info,
-       .update_capsule           = xen_efi_update_capsule,
-       .query_capsule_caps       = xen_efi_query_capsule_caps,
-       .get_next_high_mono_count = xen_efi_get_next_high_mono_count,
-       .reset_system             = xen_efi_reset_system,
-       .set_virtual_address_map  = NULL, /* Not used under Xen. */
-       .flags                    = 0     /* Initialized later. */
-};
-
 static efi_system_table_t __init *xen_efi_probe(void)
 {
        struct xen_platform_op op = {
@@ -102,7 +70,18 @@ static efi_system_table_t __init *xen_efi_probe(void)
 
        /* Here we know that Xen runs on EFI platform. */
 
-       efi = efi_xen;
+       efi.get_time = xen_efi_get_time;
+       efi.set_time = xen_efi_set_time;
+       efi.get_wakeup_time = xen_efi_get_wakeup_time;
+       efi.set_wakeup_time = xen_efi_set_wakeup_time;
+       efi.get_variable = xen_efi_get_variable;
+       efi.get_next_variable = xen_efi_get_next_variable;
+       efi.set_variable = xen_efi_set_variable;
+       efi.query_variable_info = xen_efi_query_variable_info;
+       efi.update_capsule = xen_efi_update_capsule;
+       efi.query_capsule_caps = xen_efi_query_capsule_caps;
+       efi.get_next_high_mono_count = xen_efi_get_next_high_mono_count;
+       efi.reset_system = xen_efi_reset_system;
 
        efi_systab_xen.tables = info->cfg.addr;
        efi_systab_xen.nr_tables = info->cfg.nent;
-- 
1.7.10.4


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