The patch titled
Subject: mm: rationalise flush_icache_pages() and flush_icache_page()
has been added to the -mm mm-unstable branch. Its filename is
mm-rationalise-flush_icache_pages-and-flush_icache_page.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-rationalise-flush_icache_pages-and-flush_icache_page.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: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: mm: rationalise flush_icache_pages() and flush_icache_page()
Date: Mon, 10 Jul 2023 21:43:32 +0100
Move the default (no-op) implementation of flush_icache_pages() to
<linux/cacheflush.h> from <asm-generic/cacheflush.h>. Remove the
flush_icache_page() wrapper from each architecture into
<linux/cacheflush.h>.
Link: https://lkml.kernel.org/r/20230710204339.3554919-32-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/alpha/include/asm/cacheflush.h | 5 +----
arch/arc/include/asm/cacheflush.h | 9 ---------
arch/arm/include/asm/cacheflush.h | 7 -------
arch/csky/abiv1/inc/abi/cacheflush.h | 1 -
arch/csky/abiv2/inc/abi/cacheflush.h | 1 -
arch/hexagon/include/asm/cacheflush.h | 2 +-
arch/loongarch/include/asm/cacheflush.h | 2 --
arch/m68k/include/asm/cacheflush_mm.h | 1 -
arch/mips/include/asm/cacheflush.h | 6 ------
arch/nios2/include/asm/cacheflush.h | 2 +-
arch/parisc/include/asm/cacheflush.h | 2 +-
arch/sh/include/asm/cacheflush.h | 2 +-
arch/sparc/include/asm/cacheflush_32.h | 2 --
arch/sparc/include/asm/cacheflush_64.h | 3 ---
arch/xtensa/include/asm/cacheflush.h | 4 ----
include/asm-generic/cacheflush.h | 12 ------------
include/linux/cacheflush.h | 9 +++++++++
17 files changed, 14 insertions(+), 56 deletions(-)
--- a/arch/alpha/include/asm/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/alpha/include/asm/cacheflush.h
@@ -53,10 +53,6 @@ extern void flush_icache_user_page(struc
#define flush_icache_user_page flush_icache_user_page
#endif /* CONFIG_SMP */
-/* This is used only in __do_fault and do_swap_page. */
-#define flush_icache_page(vma, page) \
- flush_icache_user_page((vma), (page), 0, 0)
-
/*
* Both implementations of flush_icache_user_page flush the entire
* address space, so one call, no matter how many pages.
@@ -66,6 +62,7 @@ static inline void flush_icache_pages(st
{
flush_icache_user_page(vma, page, 0, 0);
}
+#define flush_icache_pages flush_icache_pages
#include <asm-generic/cacheflush.h>
--- a/arch/arc/include/asm/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/arc/include/asm/cacheflush.h
@@ -18,15 +18,6 @@
#include <linux/mm.h>
#include <asm/shmparam.h>
-/*
- * Semantically we need this because icache doesn't snoop dcache/dma.
- * However ARC Cache flush requires paddr as well as vaddr, latter not available
- * in the flush_icache_page() API. So we no-op it but do the equivalent work
- * in update_mmu_cache()
- */
-#define flush_icache_page(vma, page)
-#define flush_icache_pages(vma, page, nr)
-
void flush_cache_all(void);
void flush_icache_range(unsigned long kstart, unsigned long kend);
--- a/arch/arm/include/asm/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/arm/include/asm/cacheflush.h
@@ -322,13 +322,6 @@ static inline void flush_anon_page(struc
#define flush_dcache_mmap_unlock(mapping) xa_unlock_irq(&mapping->i_pages)
/*
- * We don't appear to need to do anything here. In fact, if we did, we'd
- * duplicate cache flushing elsewhere performed by flush_dcache_page().
- */
-#define flush_icache_page(vma,page) do { } while (0)
-#define flush_icache_pages(vma, page, nr) do { } while (0)
-
-/*
* flush_cache_vmap() is used when creating mappings (eg, via vmap,
* vmalloc, ioremap etc) in kernel space for pages. On non-VIPT
* caches, since the direct-mappings of these pages may contain cached
--- a/arch/csky/abiv1/inc/abi/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/csky/abiv1/inc/abi/cacheflush.h
@@ -45,7 +45,6 @@ extern void flush_cache_range(struct vm_
#define flush_cache_vmap(start, end) cache_wbinv_all()
#define flush_cache_vunmap(start, end) cache_wbinv_all()
-#define flush_icache_page(vma, page) do {} while (0);
#define flush_icache_range(start, end) cache_wbinv_range(start, end)
#define flush_icache_mm_range(mm, start, end) cache_wbinv_range(start, end)
#define flush_icache_deferred(mm) do {} while (0);
--- a/arch/csky/abiv2/inc/abi/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/csky/abiv2/inc/abi/cacheflush.h
@@ -33,7 +33,6 @@ static inline void flush_dcache_page(str
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
-#define flush_icache_page(vma, page) do { } while (0)
#define flush_icache_range(start, end) cache_wbinv_range(start, end)
--- a/arch/hexagon/include/asm/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/hexagon/include/asm/cacheflush.h
@@ -18,7 +18,7 @@
* - flush_cache_range(vma, start, end) flushes a range of pages
* - flush_icache_range(start, end) flush a range of instructions
* - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
- * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
+ * - flush_icache_pages(vma, pg, nr) flushes(invalidates) nr pages for icache
*
* Need to doublecheck which one is really needed for ptrace stuff to work.
*/
--- a/arch/loongarch/include/asm/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/loongarch/include/asm/cacheflush.h
@@ -46,8 +46,6 @@ void local_flush_icache_range(unsigned l
#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
#define flush_cache_vmap(start, end) do { } while (0)
#define flush_cache_vunmap(start, end) do { } while (0)
-#define flush_icache_page(vma, page) do { } while (0)
-#define flush_icache_pages(vma, page) do { } while (0)
#define flush_icache_user_page(vma, page, addr, len) do { } while (0)
#define flush_dcache_page(page) do { } while (0)
#define flush_dcache_mmap_lock(mapping) do { } while (0)
--- a/arch/m68k/include/asm/cacheflush_mm.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/m68k/include/asm/cacheflush_mm.h
@@ -261,7 +261,6 @@ static inline void __flush_pages_to_ram(
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
#define flush_icache_pages(vma, page, nr) \
__flush_pages_to_ram(page_address(page), nr)
-#define flush_icache_page(vma, page) flush_icache_pages(vma, page, 1)
extern void flush_icache_user_page(struct vm_area_struct *vma, struct page *page,
unsigned long addr, int len);
--- a/arch/mips/include/asm/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/mips/include/asm/cacheflush.h
@@ -82,12 +82,6 @@ static inline void flush_anon_page(struc
__flush_anon_page(page, vmaddr);
}
-static inline void flush_icache_pages(struct vm_area_struct *vma,
- struct page *page, unsigned int nr)
-{
-}
-#define flush_icache_page(vma, page) flush_icache_pages(vma, page, 1)
-
extern void (*flush_icache_range)(unsigned long start, unsigned long end);
extern void (*local_flush_icache_range)(unsigned long start, unsigned long end);
extern void (*__flush_icache_user_range)(unsigned long start,
--- a/arch/nios2/include/asm/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/nios2/include/asm/cacheflush.h
@@ -35,7 +35,7 @@ void flush_dcache_folio(struct folio *fo
extern void flush_icache_range(unsigned long start, unsigned long end);
void flush_icache_pages(struct vm_area_struct *vma, struct page *page,
unsigned int nr);
-#define flush_icache_page(vma, page) flush_icache_pages(vma, page, 1);
+#define flush_icache_pages flush_icache_pages
#define flush_cache_vmap(start, end) flush_dcache_range(start, end)
#define flush_cache_vunmap(start, end) flush_dcache_range(start, end)
--- a/arch/parisc/include/asm/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/parisc/include/asm/cacheflush.h
@@ -60,7 +60,7 @@ static inline void flush_dcache_page(str
void flush_icache_pages(struct vm_area_struct *vma, struct page *page,
unsigned int nr);
-#define flush_icache_page(vma, page) flush_icache_pages(vma, page, 1)
+#define flush_icache_pages flush_icache_pages
#define flush_icache_range(s,e) do { \
flush_kernel_dcache_range_asm(s,e); \
--- a/arch/sh/include/asm/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/sh/include/asm/cacheflush.h
@@ -53,7 +53,7 @@ extern void flush_icache_range(unsigned
#define flush_icache_user_range flush_icache_range
void flush_icache_pages(struct vm_area_struct *vma, struct page *page,
unsigned int nr);
-#define flush_icache_page(vma, page) flush_icache_pages(vma, page, 1)
+#define flush_icache_pages flush_icache_pages
extern void flush_cache_sigtramp(unsigned long address);
struct flusher_data {
--- a/arch/sparc/include/asm/cacheflush_32.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/sparc/include/asm/cacheflush_32.h
@@ -15,8 +15,6 @@
#define flush_cache_page(vma,addr,pfn) \
sparc32_cachetlb_ops->cache_page(vma, addr)
#define flush_icache_range(start, end) do { } while (0)
-#define flush_icache_page(vma, pg) do { } while (0)
-#define flush_icache_pages(vma, pg, nr) do { } while (0)
#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { \
--- a/arch/sparc/include/asm/cacheflush_64.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/sparc/include/asm/cacheflush_64.h
@@ -53,9 +53,6 @@ static inline void flush_dcache_page(str
flush_dcache_folio(page_folio(page));
}
-#define flush_icache_page(vma, pg) do { } while(0)
-#define flush_icache_pages(vma, pg, nr) do { } while(0)
-
void flush_ptrace_access(struct vm_area_struct *, struct page *,
unsigned long uaddr, void *kaddr,
unsigned long len, int write);
--- a/arch/xtensa/include/asm/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/arch/xtensa/include/asm/cacheflush.h
@@ -160,10 +160,6 @@ void local_flush_cache_page(struct vm_ar
__invalidate_icache_range(start,(end) - (start)); \
} while (0)
-/* This is not required, see Documentation/core-api/cachetlb.rst */
-#define flush_icache_page(vma,page) do { } while (0)
-#define flush_icache_pages(vma, page, nr) do { } while (0)
-
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
--- a/include/asm-generic/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/include/asm-generic/cacheflush.h
@@ -77,18 +77,6 @@ static inline void flush_icache_range(un
#define flush_icache_user_range flush_icache_range
#endif
-#ifndef flush_icache_page
-static inline void flush_icache_pages(struct vm_area_struct *vma,
- struct page *page, unsigned int nr)
-{
-}
-
-static inline void flush_icache_page(struct vm_area_struct *vma,
- struct page *page)
-{
-}
-#endif
-
#ifndef flush_icache_user_page
static inline void flush_icache_user_page(struct vm_area_struct *vma,
struct page *page,
--- a/include/linux/cacheflush.h~mm-rationalise-flush_icache_pages-and-flush_icache_page
+++ a/include/linux/cacheflush.h
@@ -17,4 +17,13 @@ static inline void flush_dcache_folio(st
#define flush_dcache_folio flush_dcache_folio
#endif /* ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE */
+#ifndef flush_icache_pages
+static inline void flush_icache_pages(struct vm_area_struct *vma,
+ struct page *page, unsigned int nr)
+{
+}
+#endif
+
+#define flush_icache_page(vma, page) flush_icache_pages(vma, page, 1)
+
#endif /* _LINUX_CACHEFLUSH_H */
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
rmap-pass-the-folio-to-__page_check_anon_rmap.patch
minmax-add-in_range-macro.patch
mm-convert-page_table_check_pte_set-to-page_table_check_ptes_set.patch
mm-add-generic-flush_icache_pages-and-documentation.patch
mm-add-folio_flush_mapping.patch
mm-remove-arch_implements_flush_dcache_folio.patch
mm-add-default-definition-of-set_ptes.patch
alpha-implement-the-new-page-table-range-api.patch
arc-implement-the-new-page-table-range-api.patch
arm-implement-the-new-page-table-range-api.patch
arm64-implement-the-new-page-table-range-api.patch
csky-implement-the-new-page-table-range-api.patch
hexagon-implement-the-new-page-table-range-api.patch
ia64-implement-the-new-page-table-range-api.patch
loongarch-implement-the-new-page-table-range-api.patch
m68k-implement-the-new-page-table-range-api.patch
microblaze-implement-the-new-page-table-range-api.patch
mips-implement-the-new-page-table-range-api.patch
nios2-implement-the-new-page-table-range-api.patch
openrisc-implement-the-new-page-table-range-api.patch
parisc-implement-the-new-page-table-range-api.patch
powerpc-implement-the-new-page-table-range-api.patch
riscv-implement-the-new-page-table-range-api.patch
s390-implement-the-new-page-table-range-api.patch
sh-implement-the-new-page-table-range-api.patch
sparc32-implement-the-new-page-table-range-api.patch
sparc64-implement-the-new-page-table-range-api.patch
um-implement-the-new-page-table-range-api.patch
x86-implement-the-new-page-table-range-api.patch
xtensa-implement-the-new-page-table-range-api.patch
mm-remove-page_mapping_file.patch
mm-rationalise-flush_icache_pages-and-flush_icache_page.patch
mm-tidy-up-set_ptes-definition.patch
mm-use-flush_icache_pages-in-do_set_pmd.patch
mm-call-update_mmu_cache_range-in-more-page-fault-handling-paths.patch
