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>

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 2644425..671d402 100644 (file)
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -225,9 +225,6 @@ static inline bool is_vm_area_hugepages(const void *addr)
 }
 
 #ifdef CONFIG_MMU
-int vmap_range(unsigned long addr, unsigned long end,
-                       phys_addr_t phys_addr, pgprot_t prot,
-                       unsigned int max_page_shift);
 void vunmap_range(unsigned long addr, unsigned long end);
 static inline void set_vm_flush_reset_perms(void *addr)
 {

diff --git a/mm/Makefile b/mm/Makefile
index e343674..0e0a5a6 100644 (file)
--- 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 8ee0136..5fe598e 100644 (file)
--- 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 d5cd528..e44983f 100644 (file)
--- 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;
 }