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>

19 files changed, 2 insertions, 18 deletions

diff --git a/arch/powerpc/include/asm/tlb.h b/arch/powerpc/include/asm/tlb.h
index 862985cf5180..fbc6f3002f23 100644
--- a/arch/powerpc/include/asm/tlb.h
+++ b/arch/powerpc/include/asm/tlb.h
@@ -12,7 +12,6 @@
 #ifndef __powerpc64__
 #include <linux/pgtable.h>
 #endif
-#include <asm/pgalloc.h>
 #ifndef __powerpc64__
 #include <asm/page.h>
 #include <asm/mmu.h>
diff --git a/arch/powerpc/mm/book3s64/hash_hugetlbpage.c b/arch/powerpc/mm/book3s64/hash_hugetlbpage.c
index 25acb9c5ee1b..964467b3a776 100644
--- a/arch/powerpc/mm/book3s64/hash_hugetlbpage.c
+++ b/arch/powerpc/mm/book3s64/hash_hugetlbpage.c
@@ -10,7 +10,6 @@
 
 #include <linux/mm.h>
 #include <linux/hugetlb.h>
-#include <asm/pgalloc.h>
 #include <asm/cacheflush.h>
 #include <asm/machdep.h>
 
diff --git a/arch/powerpc/mm/book3s64/hash_pgtable.c b/arch/powerpc/mm/book3s64/hash_pgtable.c
index 2a99167afbaf..fd9c7f91b092 100644
--- a/arch/powerpc/mm/book3s64/hash_pgtable.c
+++ b/arch/powerpc/mm/book3s64/hash_pgtable.c
@@ -9,7 +9,6 @@
 #include <linux/mm_types.h>
 #include <linux/mm.h>
 
-#include <asm/pgalloc.h>
 #include <asm/sections.h>
 #include <asm/mmu.h>
 #include <asm/tlb.h>
diff --git a/arch/powerpc/mm/book3s64/hash_tlb.c b/arch/powerpc/mm/book3s64/hash_tlb.c
index 0fbf3dc9f2c2..eb0bccaf221e 100644
--- a/arch/powerpc/mm/book3s64/hash_tlb.c
+++ b/arch/powerpc/mm/book3s64/hash_tlb.c
@@ -21,7 +21,6 @@
 #include <linux/mm.h>
 #include <linux/percpu.h>
 #include <linux/hardirq.h>
-#include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 #include <asm/tlb.h>
 #include <asm/bug.h>
diff --git a/arch/powerpc/mm/book3s64/radix_hugetlbpage.c b/arch/powerpc/mm/book3s64/radix_hugetlbpage.c
index c812b401b66c..cb91071eef52 100644
--- a/arch/powerpc/mm/book3s64/radix_hugetlbpage.c
+++ b/arch/powerpc/mm/book3s64/radix_hugetlbpage.c
@@ -2,7 +2,6 @@
 #include <linux/mm.h>
 #include <linux/hugetlb.h>
 #include <linux/security.h>
-#include <asm/pgalloc.h>
 #include <asm/cacheflush.h>
 #include <asm/machdep.h>
 #include <asm/mman.h>
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index 5a5469eb3174..7ea19dc4883b 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -29,7 +29,6 @@
 #include <linux/slab.h>
 #include <linux/hugetlb.h>
 
-#include <asm/pgalloc.h>
 #include <asm/prom.h>
 #include <asm/io.h>
 #include <asm/mmu.h>
diff --git a/arch/powerpc/mm/kasan/8xx.c b/arch/powerpc/mm/kasan/8xx.c
index 569d98a41881..2784224054f8 100644
--- a/arch/powerpc/mm/kasan/8xx.c
+++ b/arch/powerpc/mm/kasan/8xx.c
@@ -5,7 +5,6 @@
 #include <linux/kasan.h>
 #include <linux/memblock.h>
 #include <linux/hugetlb.h>
-#include <asm/pgalloc.h>
 
 static int __init
 kasan_init_shadow_8M(unsigned long k_start, unsigned long k_end, void *block)
diff --git a/arch/powerpc/mm/kasan/book3s_32.c b/arch/powerpc/mm/kasan/book3s_32.c
index a32b4640b9de..202bd260a009 100644
--- a/arch/powerpc/mm/kasan/book3s_32.c
+++ b/arch/powerpc/mm/kasan/book3s_32.c
@@ -4,7 +4,6 @@
 
 #include <linux/kasan.h>
 #include <linux/memblock.h>
-#include <asm/pgalloc.h>
 #include <mm/mmu_decl.h>
 
 int __init kasan_init_region(void *start, size_t size)
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index c2c11eb8dcfc..ab12916ec1a7 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -34,7 +34,6 @@
 #include <linux/dma-direct.h>
 #include <linux/kprobes.h>
 
-#include <asm/pgalloc.h>
 #include <asm/prom.h>
 #include <asm/io.h>
 #include <asm/mmu_context.h>
diff --git a/arch/powerpc/mm/nohash/40x.c b/arch/powerpc/mm/nohash/40x.c
index 13e74bc39ba5..95751c322f6c 100644
--- a/arch/powerpc/mm/nohash/40x.c
+++ b/arch/powerpc/mm/nohash/40x.c
@@ -32,7 +32,6 @@
 #include <linux/highmem.h>
 #include <linux/memblock.h>
 
-#include <asm/pgalloc.h>
 #include <asm/prom.h>
 #include <asm/io.h>
 #include <asm/mmu_context.h>
diff --git a/arch/powerpc/mm/nohash/8xx.c b/arch/powerpc/mm/nohash/8xx.c
index 92e8929cbe3e..d2b37146ae6c 100644
--- a/arch/powerpc/mm/nohash/8xx.c
+++ b/arch/powerpc/mm/nohash/8xx.c
@@ -13,7 +13,6 @@
 #include <asm/fixmap.h>
 #include <asm/code-patching.h>
 #include <asm/inst.h>
-#include <asm/pgalloc.h>
 
 #include <mm/mmu_decl.h>
 
diff --git a/arch/powerpc/mm/nohash/fsl_booke.c b/arch/powerpc/mm/nohash/fsl_booke.c
index c06dfbb771f4..0c294827d6e5 100644
--- a/arch/powerpc/mm/nohash/fsl_booke.c
+++ b/arch/powerpc/mm/nohash/fsl_booke.c
@@ -37,7 +37,6 @@
 #include <linux/highmem.h>
 #include <linux/memblock.h>
 
-#include <asm/pgalloc.h>
 #include <asm/prom.h>
 #include <asm/io.h>
 #include <asm/mmu_context.h>
diff --git a/arch/powerpc/mm/nohash/kaslr_booke.c b/arch/powerpc/mm/nohash/kaslr_booke.c
index bce0e5349978..4c74e8a5482b 100644
--- a/arch/powerpc/mm/nohash/kaslr_booke.c
+++ b/arch/powerpc/mm/nohash/kaslr_booke.c
@@ -15,7 +15,6 @@
 #include <linux/libfdt.h>
 #include <linux/crash_core.h>
 #include <asm/cacheflush.h>
-#include <asm/pgalloc.h>
 #include <asm/prom.h>
 #include <asm/kdump.h>
 #include <mm/mmu_decl.h>
diff --git a/arch/powerpc/mm/nohash/tlb.c b/arch/powerpc/mm/nohash/tlb.c
index 696f568253a0..14514585db98 100644
--- a/arch/powerpc/mm/nohash/tlb.c
+++ b/arch/powerpc/mm/nohash/tlb.c
@@ -34,6 +34,7 @@
 #include <linux/of_fdt.h>
 #include <linux/hugetlb.h>
 
+#include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 #include <asm/tlb.h>
 #include <asm/code-patching.h>
diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c
index 1136257c3a99..9c0547d77af3 100644
--- a/arch/powerpc/mm/pgtable.c
+++ b/arch/powerpc/mm/pgtable.c
@@ -23,7 +23,6 @@
 #include <linux/percpu.h>
 #include <linux/hardirq.h>
 #include <linux/hugetlb.h>
-#include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 #include <asm/tlb.h>
 #include <asm/hugetlb.h>
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index bb43a8c04bee..cc6e2f94517f 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -31,7 +31,6 @@
 #include <linux/slab.h>
 #include <linux/hugetlb.h>
 
-#include <asm/pgalloc.h>
 #include <asm/page.h>
 #include <asm/prom.h>
 #include <asm/mmu_context.h>
diff --git a/arch/powerpc/mm/ptdump/hashpagetable.c b/arch/powerpc/mm/ptdump/hashpagetable.c
index a2c33efc7ce8..ff4b05a9e7f0 100644
--- a/arch/powerpc/mm/ptdump/hashpagetable.c
+++ b/arch/powerpc/mm/ptdump/hashpagetable.c
@@ -17,10 +17,10 @@
 #include <linux/seq_file.h>
 #include <linux/const.h>
 #include <asm/page.h>
-#include <asm/pgalloc.h>
 #include <asm/plpar_wrappers.h>
 #include <linux/memblock.h>
 #include <asm/firmware.h>
+#include <asm/pgalloc.h>
 
 struct pg_state {
 	struct seq_file *seq;
diff --git a/arch/powerpc/mm/ptdump/ptdump.c b/arch/powerpc/mm/ptdump/ptdump.c
index de6e05ef871c..f7ba13c41d13 100644
--- a/arch/powerpc/mm/ptdump/ptdump.c
+++ b/arch/powerpc/mm/ptdump/ptdump.c
@@ -21,7 +21,6 @@
 #include <asm/fixmap.h>
 #include <linux/const.h>
 #include <asm/page.h>
-#include <asm/pgalloc.h>
 #include <asm/hugetlb.h>
 
 #include <mm/mmu_decl.h>
diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c
index 9dba7e880885..45a3a3022a85 100644
--- a/arch/powerpc/platforms/pseries/cmm.c
+++ b/arch/powerpc/platforms/pseries/cmm.c
@@ -26,7 +26,6 @@
 #include <asm/firmware.h>
 #include <asm/hvcall.h>
 #include <asm/mmu.h>
-#include <asm/pgalloc.h>
 #include <linux/uaccess.h>
 #include <linux/memory.h>
 #include <asm/plpar_wrappers.h>