[PATCH] efistub/x86: Use struct boot_e820_entry for size calculations

From: Thorsten Blum

Date: Sat Aug 29 2026 - 17:21:03 EST


alloc_e820ext() and setup_e820() use sizeof(struct e820_entry) when
calculating the sizes of boot_e820_entry structures.

Even though struct e820_entry and struct boot_e820_entry have the same
size, use sizeof(struct boot_e820_entry) for consistency instead.

Signed-off-by: Thorsten Blum <blum@xxxxxxxxxx>
---
drivers/firmware/efi/libstub/x86-stub.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c
index cef32e2c82d8..ae2481f8a4c3 100644
--- a/drivers/firmware/efi/libstub/x86-stub.c
+++ b/drivers/firmware/efi/libstub/x86-stub.c
@@ -648,7 +648,7 @@ setup_e820(struct boot_params *params, struct setup_data *e820ext, u32 e820ext_s
}

if (nr_entries == ARRAY_SIZE(params->e820_table)) {
- u32 need = (nr_desc - i) * sizeof(struct e820_entry) +
+ u32 need = (nr_desc - i) * sizeof(struct boot_e820_entry) +
sizeof(struct setup_data);

if (!e820ext || e820ext_size < need)
@@ -684,7 +684,7 @@ static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
unsigned long size;

size = sizeof(struct setup_data) +
- sizeof(struct e820_entry) * nr_desc;
+ sizeof(struct boot_e820_entry) * nr_desc;

if (*e820ext) {
efi_bs_call(free_pool, *e820ext);