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>

5 files changed, 3 insertions, 4 deletions

diff --git a/arch/m68k/mm/cache.c b/arch/m68k/mm/cache.c
index 5ecb3310e874..b486c0889eec 100644
--- a/arch/m68k/mm/cache.c
+++ b/arch/m68k/mm/cache.c
@@ -8,7 +8,7 @@
  */
 
 #include <linux/module.h>
-#include <asm/pgalloc.h>
+#include <asm/cacheflush.h>
 #include <asm/traps.h>
 
 
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index a94a814ad6ad..508abb63da67 100644
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -15,7 +15,6 @@
 
 #include <asm/setup.h>
 #include <asm/traps.h>
-#include <asm/pgalloc.h>
 
 extern void die_if_kernel(char *, struct pt_regs *, long);
 
diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c
index 14d31d216cef..1269d513b221 100644
--- a/arch/m68k/mm/kmap.c
+++ b/arch/m68k/mm/kmap.c
@@ -19,8 +19,8 @@
 #include <asm/setup.h>
 #include <asm/segment.h>
 #include <asm/page.h>
-#include <asm/pgalloc.h>
 #include <asm/io.h>
+#include <asm/tlbflush.h>
 
 #undef DEBUG
 
diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c
index 7d04210d34f0..7068126cedc1 100644
--- a/arch/m68k/mm/mcfmmu.c
+++ b/arch/m68k/mm/mcfmmu.c
@@ -20,6 +20,7 @@
 #include <asm/mmu_context.h>
 #include <asm/mcf_pgalloc.h>
 #include <asm/tlbflush.h>
+#include <asm/pgalloc.h>
 
 #define KMAPAREA(x)	((x >= VMALLOC_START) && (x < KMAP_END))
 
diff --git a/arch/m68k/mm/memory.c b/arch/m68k/mm/memory.c
index 65e0c4071912..fe75aecfb238 100644
--- a/arch/m68k/mm/memory.c
+++ b/arch/m68k/mm/memory.c
@@ -17,7 +17,6 @@
 #include <asm/setup.h>
 #include <asm/segment.h>
 #include <asm/page.h>
-#include <asm/pgalloc.h>
 #include <asm/traps.h>
 #include <asm/machdep.h>