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From: Sang-Heon Jeon <ekffu200098@gmail.com>
To: Ard Biesheuvel <ardb@kernel.org>, Borislav Petkov <bp@alien8.de>,
	Chris Zankel <chris@zankel.net>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Ingo Molnar <mingo@redhat.com>,
	John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
	Madhavan Srinivasan <maddy@linux.ibm.com>,
	Max Filippov <jcmvbkbc@gmail.com>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Rich Felker <dalias@libc.org>, Thomas Gleixner <tglx@kernel.org>,
	Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Sang-Heon Jeon <ekffu200098@gmail.com>,
	"Christophe Leroy (CS GROUP)" <chleroy@kernel.org>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Ilias Apalodimas <ilias.apalodimas@linaro.org>,
	linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org, linux-sh@vger.kernel.org,
	Nicholas Piggin <npiggin@gmail.com>,
	x86@kernel.org
Subject: [PATCH 0/5] treewide: remove unreachable memblock_reserve() return value checks in early boot
Date: Wed, 17 Jun 2026 03:29:51 +0900	[thread overview]
Message-ID: <20260616182959.2429774-1-ekffu200098@gmail.com> (raw)

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(-)

-- 
2.43.0



             reply	other threads:[~2026-06-16 18:30 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-16 18:29 Sang-Heon Jeon [this message]
2026-06-16 18:29 ` [PATCH 3/5] powerpc/fadump: remove unreachable memblock_reserve() return value checks Sang-Heon Jeon
2026-06-17  9:27   ` Mukesh Kumar Chaurasiya

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