mm: remove unneeded includes of <asm/pgalloc.h>

Patch series "mm: cleanup usage of <asm/pgalloc.h>"

Most architectures have very similar versions of pXd_alloc_one() and
pXd_free_one() for intermediate levels of page table.  These patches add
generic versions of these functions in <asm-generic/pgalloc.h> and enable
use of the generic functions where appropriate.

In addition, functions declared and defined in <asm/pgalloc.h> headers are
used mostly by core mm and early mm initialization in arch and there is no
actual reason to have the <asm/pgalloc.h> included all over the place.
The first patch in this series removes unneeded includes of
<asm/pgalloc.h>

In the end it didn't work out as neatly as I hoped and moving
pXd_alloc_track() definitions to <asm-generic/pgalloc.h> would require
unnecessary changes to arches that have custom page table allocations, so
I've decided to move lib/ioremap.c to mm/ and make pgalloc-track.h local
to mm/.

This patch (of 8):

In most cases <asm/pgalloc.h> header is required only for allocations of
page table memory.  Most of the .c files that include that header do not
use symbols declared in <asm/pgalloc.h> and do not require that header.

As for the other header files that used to include <asm/pgalloc.h>, it is
possible to move that include into the .c file that actually uses symbols
from <asm/pgalloc.h> and drop the include from the header file.

The process was somewhat automated using

	sed -i -E '/[<"]asm\/pgalloc\.h/d' \
                $(grep -L -w -f /tmp/xx \
                        $(git grep -E -l '[<"]asm/pgalloc\.h'))

where /tmp/xx contains all the symbols defined in
arch/*/include/asm/pgalloc.h.

[rppt@linux.ibm.com: fix powerpc warning]

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Cc: Abdul Haleem <abdhalee@linux.vnet.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Matthew Wilcox <willy@infradead.org>
Link: http://lkml.kernel.org/r/20200627143453.31835-1-rppt@kernel.org
Link: http://lkml.kernel.org/r/20200627143453.31835-2-rppt@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/alpha/include/asm/tlbflush.h

@@ -5,7 +5,6 @@
 #include <linux/mm.h>
 #include <linux/sched.h>
 #include <asm/compiler.h>
-#include <asm/pgalloc.h>
 
 #ifndef __EXTERN_INLINE
 #define __EXTERN_INLINE extern inline

arch/alpha/kernel/core_irongate.c

@@ -302,7 +302,6 @@ irongate_init_arch(void)
 #include <linux/agp_backend.h>
 #include <linux/agpgart.h>
 #include <linux/export.h>
-#include <asm/pgalloc.h>
 
 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr))

arch/alpha/kernel/core_marvel.c

@@ -23,7 +23,6 @@
 #include <asm/ptrace.h>
 #include <asm/smp.h>
 #include <asm/gct.h>
-#include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 #include <asm/vga.h>
 

arch/alpha/kernel/core_titan.c

@@ -20,7 +20,6 @@
 
 #include <asm/ptrace.h>
 #include <asm/smp.h>
-#include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 #include <asm/vga.h>
 

arch/alpha/kernel/machvec_impl.h

@@ -7,8 +7,6 @@
  * This file has goodies to help simplify instantiation of machine vectors.
  */
 
-#include <asm/pgalloc.h>
-
 /* Whee.  These systems don't have an HAE:
        IRONGATE, MARVEL, POLARIS, TSUNAMI, TITAN, WILDFIRE
    Fix things up for the GENERIC kernel by defining the HAE address

arch/alpha/kernel/smp.c

@@ -36,7 +36,6 @@
 
 #include <asm/io.h>
 #include <asm/irq.h>
-#include <asm/pgalloc.h>
 #include <asm/mmu_context.h>
 #include <asm/tlbflush.h>
 

arch/alpha/mm/numa.c

@@ -17,7 +17,6 @@
 #include <linux/module.h>
 
 #include <asm/hwrpb.h>
-#include <asm/pgalloc.h>
 #include <asm/sections.h>
 
 pg_data_t node_data[MAX_NUMNODES];

arch/arc/mm/fault.c

@@ -13,7 +13,6 @@
 #include <linux/kdebug.h>
 #include <linux/perf_event.h>
 #include <linux/mm_types.h>
-#include <asm/pgalloc.h>
 #include <asm/mmu.h>
 
 /*

arch/arc/mm/init.c

@@ -14,7 +14,6 @@
 #include <linux/module.h>
 #include <linux/highmem.h>
 #include <asm/page.h>
-#include <asm/pgalloc.h>
 #include <asm/sections.h>
 #include <asm/arcregs.h>
 

arch/arm/include/asm/tlb.h

@@ -27,7 +27,6 @@
 #else /* !CONFIG_MMU */
 
 #include <linux/swap.h>
-#include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 
 static inline void __tlb_remove_table(void *_table)

arch/arm/kernel/machine_kexec.c

@@ -11,7 +11,6 @@
 #include <linux/irq.h>
 #include <linux/memblock.h>
 #include <linux/of_fdt.h>
-#include <asm/pgalloc.h>
 #include <asm/mmu_context.h>
 #include <asm/cacheflush.h>
 #include <asm/fncpy.h>

arch/arm/kernel/smp.c

@@ -37,7 +37,6 @@
 #include <asm/idmap.h>
 #include <asm/topology.h>
 #include <asm/mmu_context.h>
-#include <asm/pgalloc.h>
 #include <asm/procinfo.h>
 #include <asm/processor.h>
 #include <asm/sections.h>

arch/arm/kernel/suspend.c

@@ -7,7 +7,6 @@
 #include <asm/bugs.h>
 #include <asm/cacheflush.h>
 #include <asm/idmap.h>
-#include <asm/pgalloc.h>
 #include <asm/memory.h>
 #include <asm/smp_plat.h>
 #include <asm/suspend.h>

arch/arm/mach-omap2/omap-mpuss-lowpower.c

@@ -42,7 +42,6 @@
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
 #include <asm/smp_scu.h>
-#include <asm/pgalloc.h>
 #include <asm/suspend.h>
 #include <asm/virt.h>
 #include <asm/hardware/cache-l2x0.h>

arch/arm/mm/hugetlbpage.c

@@ -17,7 +17,6 @@
 #include <asm/mman.h>
 #include <asm/tlb.h>
 #include <asm/tlbflush.h>
-#include <asm/pgalloc.h>
 
 /*
  * On ARM, huge pages are backed by pmd's rather than pte's, so we do a lot

arch/arm/mm/mmu.c

@@ -29,6 +29,7 @@
 #include <asm/traps.h>
 #include <asm/procinfo.h>
 #include <asm/memory.h>
+#include <asm/pgalloc.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>

arch/arm64/kernel/smp.c

@@ -43,7 +43,6 @@
 #include <asm/kvm_mmu.h>
 #include <asm/mmu_context.h>
 #include <asm/numa.h>
-#include <asm/pgalloc.h>
 #include <asm/processor.h>
 #include <asm/smp_plat.h>
 #include <asm/sections.h>

arch/arm64/mm/hugetlbpage.c

@@ -17,7 +17,6 @@
 #include <asm/mman.h>
 #include <asm/tlb.h>
 #include <asm/tlbflush.h>
-#include <asm/pgalloc.h>
 
 /*
  * HugeTLB Support Matrix

arch/arm64/mm/ioremap.c

@@ -16,7 +16,6 @@
 
 #include <asm/fixmap.h>
 #include <asm/tlbflush.h>
-#include <asm/pgalloc.h>
 
 static void __iomem *__ioremap_caller(phys_addr_t phys_addr, size_t size,
 				      pgprot_t prot, void *caller)

arch/arm64/mm/mmu.c

@@ -35,6 +35,7 @@
 #include <asm/mmu_context.h>
 #include <asm/ptdump.h>
 #include <asm/tlbflush.h>
+#include <asm/pgalloc.h>
 
 #define NO_BLOCK_MAPPINGS	BIT(0)
 #define NO_CONT_MAPPINGS	BIT(1)