The patch titled
Subject: mm: provide a fallback for PAGE_KERNEL_EXEC for architectures
has been added to the -mm tree. Its filename is
mm-provide-a-fallback-for-page_kernel_exec-for-architectures.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-provide-a-fallback-for-page_kernel_exec-for-architectures.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-provide-a-fallback-for-page_kernel_exec-for-architectures.patch
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------------------------------------------------------
From: "Luis R. Rodriguez" <mcgrof@xxxxxxxxxx>
Subject: mm: provide a fallback for PAGE_KERNEL_EXEC for architectures
Some architectures just don't have PAGE_KERNEL_EXEC. The mm/nommu.c and
mm/vmalloc.c code have been using PAGE_KERNEL as a fallback for years.
Move this fallback to asm-generic.
Link: http://lkml.kernel.org/r/20180510185507.2439-3-mcgrof@xxxxxxxxxx
Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxxxx>
Suggested-by: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/asm-generic/pgtable.h | 4 ++++
mm/nommu.c | 4 ----
mm/vmalloc.c | 4 ----
3 files changed, 4 insertions(+), 8 deletions(-)
diff -puN include/asm-generic/pgtable.h~mm-provide-a-fallback-for-page_kernel_exec-for-architectures include/asm-generic/pgtable.h
--- a/include/asm-generic/pgtable.h~mm-provide-a-fallback-for-page_kernel_exec-for-architectures
+++ a/include/asm-generic/pgtable.h
@@ -1097,6 +1097,10 @@ static inline void init_espfix_bsp(void)
# define PAGE_KERNEL_RO PAGE_KERNEL
#endif
+#ifndef PAGE_KERNEL_EXEC
+# define PAGE_KERNEL_EXEC PAGE_KERNEL
+#endif
+
#endif /* !__ASSEMBLY__ */
#ifndef io_remap_pfn_range
diff -puN mm/nommu.c~mm-provide-a-fallback-for-page_kernel_exec-for-architectures mm/nommu.c
--- a/mm/nommu.c~mm-provide-a-fallback-for-page_kernel_exec-for-architectures
+++ a/mm/nommu.c
@@ -364,10 +364,6 @@ void *vzalloc_node(unsigned long size, i
}
EXPORT_SYMBOL(vzalloc_node);
-#ifndef PAGE_KERNEL_EXEC
-# define PAGE_KERNEL_EXEC PAGE_KERNEL
-#endif
-
/**
* vmalloc_exec - allocate virtually contiguous, executable memory
* @size: allocation size
diff -puN mm/vmalloc.c~mm-provide-a-fallback-for-page_kernel_exec-for-architectures mm/vmalloc.c
--- a/mm/vmalloc.c~mm-provide-a-fallback-for-page_kernel_exec-for-architectures
+++ a/mm/vmalloc.c
@@ -1907,10 +1907,6 @@ void *vzalloc_node(unsigned long size, i
}
EXPORT_SYMBOL(vzalloc_node);
-#ifndef PAGE_KERNEL_EXEC
-# define PAGE_KERNEL_EXEC PAGE_KERNEL
-#endif
-
/**
* vmalloc_exec - allocate virtually contiguous, executable memory
* @size: allocation size
_
Patches currently in -mm which might be from mcgrof@xxxxxxxxxx are
mm-provide-a-fallback-for-page_kernel_ro-for-architectures.patch
mm-provide-a-fallback-for-page_kernel_exec-for-architectures.patch
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