From: Arnd Bergmann <arnd@kernel.org>
To: Pasha Tatashin <pasha.tatashin@soleen.com>,
Mike Rapoport <rppt@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Pratyush Yadav <pratyush@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>, linux-kernel@vger.kernel.org
Subject: [PATCH] mm: memfd_luo: add CONFIG_SHMEM dependency
Date: Thu, 4 Dec 2025 11:01:58 +0100 [thread overview]
Message-ID: <20251204100203.1034394-1-arnd@kernel.org> (raw)
From: Arnd Bergmann <arnd@arndb.de>
The new memfd code fails to link without SHMEM:
aarch64-linux-ld: mm/memfd_luo.o: in function `memfd_luo_retrieve_folios':
memfd_luo.c:(.text.memfd_luo_retrieve_folios+0xdc): undefined reference to `shmem_add_to_page_cache'
memfd_luo.c:(.text.memfd_luo_retrieve_folios+0x11c): undefined reference to `shmem_inode_acct_blocks'
memfd_luo.c:(.text.memfd_luo_retrieve_folios+0x134): undefined reference to `shmem_recalc_inode'
Add a Kconfig dependency to disallow that configuration.
Fixes: b3749f174d68 ("mm: memfd_luo: allow preserving memfd")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
kernel/liveupdate/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/liveupdate/Kconfig b/kernel/liveupdate/Kconfig
index 86a58eaf433a..80b77db2b0e0 100644
--- a/kernel/liveupdate/Kconfig
+++ b/kernel/liveupdate/Kconfig
@@ -53,6 +53,7 @@ config KEXEC_HANDOVER_ENABLE_DEFAULT
config LIVEUPDATE
bool "Live Update Orchestrator"
depends on KEXEC_HANDOVER
+ depends on SHMEM
help
Enable the Live Update Orchestrator. Live Update is a mechanism,
typically based on kexec, that allows the kernel to be updated
--
2.39.5
next reply other threads:[~2025-12-04 10:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-04 10:01 Arnd Bergmann [this message]
2025-12-04 10:12 ` [PATCH] mm: memfd_luo: add CONFIG_SHMEM dependency Pratyush Yadav
2025-12-04 11:01 ` Mike Rapoport
2025-12-04 14:09 ` Pasha Tatashin
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