[PATCH 0/5] treewide: remove unreachable memblock_reserve() return value checks in early boot

From: Sang-Heon Jeon

Date: Tue Jun 16 2026 - 14:30:23 EST


memblock_reserve() can only return an error after memblock_allow_resize()
has been called. Before that it either succeeds or panics, never returning
an error.

Before memblock_allow_resize() is called, the return value checks of
memblock_reserve() are unreachable and can be removed.

All the call sites are in different trees, so I split the change into one
patch per arch/subsystem. The patches are independent and can be applied
separately.

Sang-Heon Jeon (5):
x86/setup: remove unreachable memblock_reserve() return value check
sh: remove unreachable memblock_reserve() return value check
powerpc/fadump: remove unreachable memblock_reserve() return value
checks
xtensa: remove unreachable memblock_reserve() return value checks
Revert "tpm: do not ignore memblock_reserve return value"

arch/powerpc/kernel/fadump.c | 14 +++-----------
arch/sh/kernel/machine_kexec.c | 7 +------
arch/x86/kernel/setup.c | 7 ++-----
arch/xtensa/kernel/setup.c | 13 +++++++------
drivers/firmware/efi/tpm.c | 7 +------
5 files changed, 14 insertions(+), 34 deletions(-)

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2.43.0