[coreboot-gerrit] [XS] Change in coreboot[main]: arch/arm64: Avoid GCC warning about out of bounds array access

[Felix Singer (Code Review)]

Felix Singer has submitted this change. ( https://review.coreboot.org/c/coreboot/+/79014?usp=email )

Change subject: arch/arm64: Avoid GCC warning about out of bounds array access
......................................................................

arch/arm64: Avoid GCC warning about out of bounds array access

With the update to GCC 13 a new warning about subtracting numbers from
arrays appears.

src/arch/arm64/armv8/mmu.c:296:9: error: array subscript -1 is outside array bounds of 'u8[]' {aka 'unsigned char[]'} [-Werror=array-bounds=]

Change-Id: I4757ca2e7ad3f969d7416041ea40c3e9866cdf49
Signed-off-by: Zebreus 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79014
Reviewed-by: Felix Singer 
Tested-by: build bot (Jenkins) 
---
M src/arch/arm64/armv8/mmu.c
1 file changed, 1 insertion(+), 1 deletion(-)

Approvals:
  Felix Singer: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/src/arch/arm64/armv8/mmu.c b/src/arch/arm64/armv8/mmu.c
index 61ca49f..3cedbcf 100644
--- a/src/arch/arm64/armv8/mmu.c
+++ b/src/arch/arm64/armv8/mmu.c
@@ -293,7 +293,7 @@
 void mmu_enable(void)
 {
    assert_correct_ttb_mapping(_ttb);
-	assert_correct_ttb_mapping(_ettb - 1);
+	assert_correct_ttb_mapping((void *)((uintptr_t)_ettb - 1));

uint32_t sctlr = raw_read_sctlr_el3();
    sctlr |= SCTLR_C | SCTLR_M | SCTLR_I;