The patch titled
Subject: arm64/mm: export contpte symbols only to GPL users
has been added to the -mm mm-unstable branch. Its filename is
arm64-mm-export-contpte-symbols-only-to-gpl-users.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/arm64-mm-export-contpte-symbols-only-to-gpl-users.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Ryan Roberts <ryan.roberts@xxxxxxx>
Subject: arm64/mm: export contpte symbols only to GPL users
Date: Mon, 26 Feb 2024 12:03:20 +0000
Patch series "Address some contpte nits".
These 2 patches address some nits raised by Catalin late in the review cycle for
my contpte series [1].
[1] https://lore.kernel.org/linux-mm/20240215103205.2607016-1-ryan.roberts@xxxxxxx/
This patch (of 2):
The contpte symbols must be exported since some of the public inline
ptep_* APIs are called from modules and these inlines now call the contpte
functions. Originally they were exported as EXPORT_SYMBOL() for fear of
breaking out-of-tree modules. But we subsequently concluded that
EXPORT_SYMBOL_GPL() should be safe since these functions are deeply core
mm routines, and any module operating at this level is not going to be
able to survive on EXPORT_SYMBOL alone.
Link: https://lkml.kernel.org/r/20240226120321.1055731-1-ryan.roberts@xxxxxxx
Link: https://lore.kernel.org/linux-mm/f9fc2b31-11cb-4969-8961-9c89fea41b74@xxxxxxxxxx/
Link: https://lkml.kernel.org/r/20240226120321.1055731-2-ryan.roberts@xxxxxxx
Signed-off-by: Ryan Roberts <ryan.roberts@xxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: John Hubbard <jhubbard@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/mm/contpte.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
--- a/arch/arm64/mm/contpte.c~arm64-mm-export-contpte-symbols-only-to-gpl-users
+++ a/arch/arm64/mm/contpte.c
@@ -135,7 +135,7 @@ void __contpte_try_fold(struct mm_struct
pte = pte_mkcont(pte);
contpte_convert(mm, addr, orig_ptep, pte);
}
-EXPORT_SYMBOL(__contpte_try_fold);
+EXPORT_SYMBOL_GPL(__contpte_try_fold);
void __contpte_try_unfold(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte)
@@ -150,7 +150,7 @@ void __contpte_try_unfold(struct mm_stru
pte = pte_mknoncont(pte);
contpte_convert(mm, addr, ptep, pte);
}
-EXPORT_SYMBOL(__contpte_try_unfold);
+EXPORT_SYMBOL_GPL(__contpte_try_unfold);
pte_t contpte_ptep_get(pte_t *ptep, pte_t orig_pte)
{
@@ -178,7 +178,7 @@ pte_t contpte_ptep_get(pte_t *ptep, pte_
return orig_pte;
}
-EXPORT_SYMBOL(contpte_ptep_get);
+EXPORT_SYMBOL_GPL(contpte_ptep_get);
pte_t contpte_ptep_get_lockless(pte_t *orig_ptep)
{
@@ -231,7 +231,7 @@ retry:
return orig_pte;
}
-EXPORT_SYMBOL(contpte_ptep_get_lockless);
+EXPORT_SYMBOL_GPL(contpte_ptep_get_lockless);
void contpte_set_ptes(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte, unsigned int nr)
@@ -274,7 +274,7 @@ void contpte_set_ptes(struct mm_struct *
} while (addr != end);
}
-EXPORT_SYMBOL(contpte_set_ptes);
+EXPORT_SYMBOL_GPL(contpte_set_ptes);
void contpte_clear_full_ptes(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, unsigned int nr, int full)
@@ -282,7 +282,7 @@ void contpte_clear_full_ptes(struct mm_s
contpte_try_unfold_partial(mm, addr, ptep, nr);
__clear_full_ptes(mm, addr, ptep, nr, full);
}
-EXPORT_SYMBOL(contpte_clear_full_ptes);
+EXPORT_SYMBOL_GPL(contpte_clear_full_ptes);
pte_t contpte_get_and_clear_full_ptes(struct mm_struct *mm,
unsigned long addr, pte_t *ptep,
@@ -291,7 +291,7 @@ pte_t contpte_get_and_clear_full_ptes(st
contpte_try_unfold_partial(mm, addr, ptep, nr);
return __get_and_clear_full_ptes(mm, addr, ptep, nr, full);
}
-EXPORT_SYMBOL(contpte_get_and_clear_full_ptes);
+EXPORT_SYMBOL_GPL(contpte_get_and_clear_full_ptes);
int contpte_ptep_test_and_clear_young(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep)
@@ -316,7 +316,7 @@ int contpte_ptep_test_and_clear_young(st
return young;
}
-EXPORT_SYMBOL(contpte_ptep_test_and_clear_young);
+EXPORT_SYMBOL_GPL(contpte_ptep_test_and_clear_young);
int contpte_ptep_clear_flush_young(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep)
@@ -337,7 +337,7 @@ int contpte_ptep_clear_flush_young(struc
return young;
}
-EXPORT_SYMBOL(contpte_ptep_clear_flush_young);
+EXPORT_SYMBOL_GPL(contpte_ptep_clear_flush_young);
void contpte_wrprotect_ptes(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, unsigned int nr)
@@ -355,7 +355,7 @@ void contpte_wrprotect_ptes(struct mm_st
contpte_try_unfold_partial(mm, addr, ptep, nr);
__wrprotect_ptes(mm, addr, ptep, nr);
}
-EXPORT_SYMBOL(contpte_wrprotect_ptes);
+EXPORT_SYMBOL_GPL(contpte_wrprotect_ptes);
int contpte_ptep_set_access_flags(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep,
@@ -401,4 +401,4 @@ int contpte_ptep_set_access_flags(struct
return 1;
}
-EXPORT_SYMBOL(contpte_ptep_set_access_flags);
+EXPORT_SYMBOL_GPL(contpte_ptep_set_access_flags);
_
Patches currently in -mm which might be from ryan.roberts@xxxxxxx are
arm64-mm-export-contpte-symbols-only-to-gpl-users.patch
arm64-mm-improve-comment-in-contpte_ptep_get_lockless.patch
