This is a note to let you know that I've just added the patch titled
riscv: Fix build error if !CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
riscv-fix-build-error-if-config_arch_enable_hugepage.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 22925e6dea8db748a714c841e4260878df664e2b
Author: Alexandre Ghiti <alexghiti@xxxxxxxxxxxx>
Date: Sun Feb 11 09:36:40 2024 +0100
riscv: Fix build error if !CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
[ Upstream commit fc325b1a915f6d0c821bfcea21fb3f1354c4323b ]
The new riscv specific arch_hugetlb_migration_supported() must be
guarded with a #ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION to avoid
the following build error:
In file included from include/linux/hugetlb.h:851,
from kernel/fork.c:52:
>> arch/riscv/include/asm/hugetlb.h:15:42: error: static declaration of 'arch_hugetlb_migration_supported' follows non-static declaration
15 | #define arch_hugetlb_migration_supported arch_hugetlb_migration_supported
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/hugetlb.h:916:20: note: in expansion of macro 'arch_hugetlb_migration_supported'
916 | static inline bool arch_hugetlb_migration_supported(struct hstate *h)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/riscv/include/asm/hugetlb.h:14:6: note: previous declaration of 'arch_hugetlb_migration_supported' with type 'bool(struct hstate *)' {aka '_Bool(struct hstate *)'}
14 | bool arch_hugetlb_migration_supported(struct hstate *h);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202402110258.CV51JlEI-lkp@xxxxxxxxx/
Fixes: ce68c035457b ("riscv: Fix arch_hugetlb_migration_supported() for NAPOT")
Signed-off-by: Alexandre Ghiti <alexghiti@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240211083640.756583-1-alexghiti@xxxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/riscv/include/asm/hugetlb.h b/arch/riscv/include/asm/hugetlb.h
index 20f9c3ba23414..22deb7a2a6ec4 100644
--- a/arch/riscv/include/asm/hugetlb.h
+++ b/arch/riscv/include/asm/hugetlb.h
@@ -11,8 +11,10 @@ static inline void arch_clear_hugepage_flags(struct page *page)
}
#define arch_clear_hugepage_flags arch_clear_hugepage_flags
+#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
bool arch_hugetlb_migration_supported(struct hstate *h);
#define arch_hugetlb_migration_supported arch_hugetlb_migration_supported
+#endif
#ifdef CONFIG_RISCV_ISA_SVNAPOT
#define __HAVE_ARCH_HUGE_PTE_CLEAR
diff --git a/arch/riscv/mm/hugetlbpage.c b/arch/riscv/mm/hugetlbpage.c
index e7b69281875b2..fbe918801667d 100644
--- a/arch/riscv/mm/hugetlbpage.c
+++ b/arch/riscv/mm/hugetlbpage.c
@@ -426,10 +426,12 @@ bool __init arch_hugetlb_valid_size(unsigned long size)
return __hugetlb_valid_size(size);
}
+#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
bool arch_hugetlb_migration_supported(struct hstate *h)
{
return __hugetlb_valid_size(huge_page_size(h));
}
+#endif
#ifdef CONFIG_CONTIG_ALLOC
static __init int gigantic_pages_init(void)
