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authorChristoph Hellwig <hch@lst.de>2021-09-07 19:56:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2021-09-08 11:50:24 -0700
commit82a70ce0426dd7c4099516175019dccbd18cebf9 (patch)
tree8cb20c4687ac5fb1ed8849bfb803c76891aa64d4 /mm
parent8350229ffceb372621e277d4d36f1ffca6212135 (diff)
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mm: move ioremap_page_range to vmalloc.c
Patch series "small ioremap cleanups". The first patch moves a little code around the vmalloc/ioremap boundary following a bigger move by Nick earlier. The second enforces non-executable mapping on ioremap just like we do for vmap. No driver currently uses executable mappings anyway, as they should. This patch (of 2): This keeps it together with the implementation, and to remove the vmap_range wrapper. Link: https://lkml.kernel.org/r/20210824091259.1324527-1-hch@lst.de Link: https://lkml.kernel.org/r/20210824091259.1324527-2-hch@lst.de Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/Makefile3
-rw-r--r--mm/ioremap.c25
-rw-r--r--mm/vmalloc.c22
3 files changed, 19 insertions, 31 deletions
diff --git a/mm/Makefile b/mm/Makefile
index e3436741d539..0e0a5a6fe127 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -38,7 +38,7 @@ mmu-y := nommu.o
mmu-$(CONFIG_MMU) := highmem.o memory.o mincore.o \
mlock.o mmap.o mmu_gather.o mprotect.o mremap.o \
msync.o page_vma_mapped.o pagewalk.o \
- pgtable-generic.o rmap.o vmalloc.o ioremap.o
+ pgtable-generic.o rmap.o vmalloc.o
ifdef CONFIG_CROSS_MEMORY_ATTACH
@@ -128,3 +128,4 @@ obj-$(CONFIG_PTDUMP_CORE) += ptdump.o
obj-$(CONFIG_PAGE_REPORTING) += page_reporting.o
obj-$(CONFIG_IO_MAPPING) += io-mapping.o
obj-$(CONFIG_HAVE_BOOTMEM_INFO_NODE) += bootmem_info.o
+obj-$(CONFIG_GENERIC_IOREMAP) += ioremap.o
diff --git a/mm/ioremap.c b/mm/ioremap.c
index 8ee0136f8cb0..5fe598ecd9b7 100644
--- a/mm/ioremap.c
+++ b/mm/ioremap.c
@@ -8,33 +8,9 @@
*/
#include <linux/vmalloc.h>
#include <linux/mm.h>
-#include <linux/sched.h>
#include <linux/io.h>
#include <linux/export.h>
-#include <asm/cacheflush.h>
-#include "pgalloc-track.h"
-
-#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
-static unsigned int __ro_after_init iomap_max_page_shift = BITS_PER_LONG - 1;
-
-static int __init set_nohugeiomap(char *str)
-{
- iomap_max_page_shift = PAGE_SHIFT;
- return 0;
-}
-early_param("nohugeiomap", set_nohugeiomap);
-#else /* CONFIG_HAVE_ARCH_HUGE_VMAP */
-static const unsigned int iomap_max_page_shift = PAGE_SHIFT;
-#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
-
-int ioremap_page_range(unsigned long addr,
- unsigned long end, phys_addr_t phys_addr, pgprot_t prot)
-{
- return vmap_range(addr, end, phys_addr, prot, iomap_max_page_shift);
-}
-
-#ifdef CONFIG_GENERIC_IOREMAP
void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot)
{
unsigned long offset, vaddr;
@@ -71,4 +47,3 @@ void iounmap(volatile void __iomem *addr)
vunmap((void *)((unsigned long)addr & PAGE_MASK));
}
EXPORT_SYMBOL(iounmap);
-#endif /* CONFIG_GENERIC_IOREMAP */
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index d5cd52805149..e44983fb2d15 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -44,6 +44,19 @@
#include "internal.h"
#include "pgalloc-track.h"
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
+static unsigned int __ro_after_init ioremap_max_page_shift = BITS_PER_LONG - 1;
+
+static int __init set_nohugeiomap(char *str)
+{
+ ioremap_max_page_shift = PAGE_SHIFT;
+ return 0;
+}
+early_param("nohugeiomap", set_nohugeiomap);
+#else /* CONFIG_HAVE_ARCH_HUGE_VMAP */
+static const unsigned int ioremap_max_page_shift = PAGE_SHIFT;
+#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
+
#ifdef CONFIG_HAVE_ARCH_HUGE_VMALLOC
static bool __ro_after_init vmap_allow_huge = true;
@@ -298,15 +311,14 @@ static int vmap_range_noflush(unsigned long addr, unsigned long end,
return err;
}
-int vmap_range(unsigned long addr, unsigned long end,
- phys_addr_t phys_addr, pgprot_t prot,
- unsigned int max_page_shift)
+int ioremap_page_range(unsigned long addr, unsigned long end,
+ phys_addr_t phys_addr, pgprot_t prot)
{
int err;
- err = vmap_range_noflush(addr, end, phys_addr, prot, max_page_shift);
+ err = vmap_range_noflush(addr, end, phys_addr, prot,
+ ioremap_max_page_shift);
flush_cache_vmap(addr, end);
-
return err;
}