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efi: Clean up config_parse_tables()

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config_parse_tables() is a jumble of pointer arithmetic, due to the
fact that on x86, we may be dealing with firmware whose native word
size differs from the kernel's.

This is not a concern on other architectures, and doesn't quite
justify the state of the code, so let's clean it up by adding a
non-x86 code path, constifying statically allocated tables and
replacing preprocessor conditionals with IS_ENABLED() checks.

Tested-by: Tony Luck <tony.luck@intel.com> # arch/ia64
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel
2020-01-22 14:40:57 +01:00
parent 3a0701dc7f
commit 06c0bd9343
5 changed files with 31 additions and 33 deletions
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3
arch/ia64/kernel/efi.c
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@@ -56,7 +56,7 @@ unsigned long __initdata esi_phys = EFI_INVALID_TABLE_ADDR;
unsigned long hcdp_phys = EFI_INVALID_TABLE_ADDR;
unsigned long sal_systab_phys = EFI_INVALID_TABLE_ADDR;
static __initdata efi_config_table_type_t arch_tables[] = {
static const efi_config_table_type_t arch_tables[] __initconst = {
{ESI_TABLE_GUID, "ESI", &esi_phys},
{HCDP_TABLE_GUID, "HCDP", &hcdp_phys},
{MPS_TABLE_GUID, "MPS", &mps_phys},
@@ -533,7 +533,6 @@ efi_init (void)
if (efi_config_parse_tables(__va(efi_systab->tables),
efi_systab->nr_tables,
sizeof(efi_config_table_t),
arch_tables) != 0)
return;