linux-next: build failure after merge of the akpm-current tree

Stephen Rothwell
2022-02-14T07:00:46Z

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Hi all,

After merging the akpm-current tree, today's linux-next build (powerpc
allyesconfig) failed like this:

arch/powerpc/kvm/book3s_hv_uvmem.c: In function 'kvmppc_uvmem_get_page':
arch/powerpc/kvm/book3s_hv_uvmem.c:691:39: error: invalid use of undefined type 'struct dev_pagemap'
691 | pfn_first = kvmppc_uvmem_pgmap.range.start >> PAGE_SHIFT;
| ^
arch/powerpc/kvm/book3s_hv_uvmem.c:693:50: error: invalid use of undefined type 'struct dev_pagemap'
693 | (range_len(&kvmppc_uvmem_pgmap.range) >> PAGE_SHIFT);
| ^
arch/powerpc/kvm/book3s_hv_uvmem.c: In function 'kvmppc_uvmem_page_free':
arch/powerpc/kvm/book3s_hv_uvmem.c:1010:44: error: invalid use of undefined type 'struct dev_pagemap'
1010 | (kvmppc_uvmem_pgmap.range.start >> PAGE_SHIFT);
| ^
arch/powerpc/kvm/book3s_hv_uvmem.c: At top level:
arch/powerpc/kvm/book3s_hv_uvmem.c:1026:21: error: variable 'kvmppc_uvmem_ops' has initializer but incomplete type
1026 | static const struct dev_pagemap_ops kvmppc_uvmem_ops = {
| ^~~~~~~~~~~~~~~
arch/powerpc/kvm/book3s_hv_uvmem.c:1027:10: error: 'const struct dev_pagemap_ops' has no member named 'page_free'
1027 | .page_free = kvmppc_uvmem_page_free,
| ^~~~~~~~~
arch/powerpc/kvm/book3s_hv_uvmem.c:1027:22: error: excess elements in struct initializer [-Werror]
1027 | .page_free = kvmppc_uvmem_page_free,
| ^~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/kvm/book3s_hv_uvmem.c:1027:22: note: (near initialization for 'kvmppc_uvmem_ops')
arch/powerpc/kvm/book3s_hv_uvmem.c:1028:10: error: 'const struct dev_pagemap_ops' has no member named 'migrate_to_ram'
1028 | .migrate_to_ram = kvmppc_uvmem_migrate_to_ram,
| ^~~~~~~~~~~~~~
arch/powerpc/kvm/book3s_hv_uvmem.c:1028:27: error: excess elements in struct initializer [-Werror]
1028 | .migrate_to_ram = kvmppc_uvmem_migrate_to_ram,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/kvm/book3s_hv_uvmem.c:1028:27: note: (near initialization for 'kvmppc_uvmem_ops')
arch/powerpc/kvm/book3s_hv_uvmem.c: In function 'kvmppc_uvmem_init':
arch/powerpc/kvm/book3s_hv_uvmem.c:1172:27: error: invalid use of undefined type 'struct dev_pagemap'
1172 | kvmppc_uvmem_pgmap.type = MEMORY_DEVICE_PRIVATE;
| ^
arch/powerpc/kvm/book3s_hv_uvmem.c:1172:35: error: 'MEMORY_DEVICE_PRIVATE' undeclared (first use in this function); did you mean 'CONFIG_DEVICE_PRIVATE'?
1172 | kvmppc_uvmem_pgmap.type = MEMORY_DEVICE_PRIVATE;
| ^~~~~~~~~~~~~~~~~~~~~
| CONFIG_DEVICE_PRIVATE
arch/powerpc/kvm/book3s_hv_uvmem.c:1172:35: note: each undeclared identifier is reported only once for each function it appears in
arch/powerpc/kvm/book3s_hv_uvmem.c:1173:27: error: invalid use of undefined type 'struct dev_pagemap'
1173 | kvmppc_uvmem_pgmap.range.start = res->start;
| ^
arch/powerpc/kvm/book3s_hv_uvmem.c:1174:27: error: invalid use of undefined type 'struct dev_pagemap'
1174 | kvmppc_uvmem_pgmap.range.end = res->end;
| ^
arch/powerpc/kvm/book3s_hv_uvmem.c:1175:27: error: invalid use of undefined type 'struct dev_pagemap'
1175 | kvmppc_uvmem_pgmap.nr_range = 1;
| ^
arch/powerpc/kvm/book3s_hv_uvmem.c:1176:27: error: invalid use of undefined type 'struct dev_pagemap'
1176 | kvmppc_uvmem_pgmap.ops = &kvmppc_uvmem_ops;
| ^
arch/powerpc/kvm/book3s_hv_uvmem.c:1178:27: error: invalid use of undefined type 'struct dev_pagemap'
1178 | kvmppc_uvmem_pgmap.owner = &kvmppc_uvmem_pgmap;
| ^
arch/powerpc/kvm/book3s_hv_uvmem.c:1179:16: error: implicit declaration of function 'memremap_pages'; did you mean 'memcmp_pages'? [-Werror=implicit-function-declaration]
1179 | addr = memremap_pages(&kvmppc_uvmem_pgmap, NUMA_NO_NODE);
| ^~~~~~~~~~~~~~
| memcmp_pages
arch/powerpc/kvm/book3s_hv_uvmem.c:1179:14: error: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Werror=int-conversion]
1179 | addr = memremap_pages(&kvmppc_uvmem_pgmap, NUMA_NO_NODE);
| ^
arch/powerpc/kvm/book3s_hv_uvmem.c:1197:9: error: implicit declaration of function 'memunmap_pages'; did you mean 'memcmp_pages'? [-Werror=implicit-function-declaration]
1197 | memunmap_pages(&kvmppc_uvmem_pgmap);
| ^~~~~~~~~~~~~~
| memcmp_pages
In file included from include/linux/device.h:17,
from arch/powerpc/include/asm/io.h:27,
from include/linux/io.h:13,
from include/linux/irq.h:20,
from arch/powerpc/include/asm/hardirq.h:6,
from include/linux/hardirq.h:11,
from include/linux/highmem.h:11,
from include/linux/pagemap.h:11,
from arch/powerpc/kvm/book3s_hv_uvmem.c:89:
arch/powerpc/kvm/book3s_hv_uvmem.c: In function 'kvmppc_uvmem_free':
arch/powerpc/kvm/book3s_hv_uvmem.c:1210:46: error: invalid use of undefined type 'struct dev_pagemap'
1210 | release_mem_region(kvmppc_uvmem_pgmap.range.start,
| ^
include/linux/ioport.h:278:76: note: in definition of macro 'release_mem_region'
278 | #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
| ^~~~~
arch/powerpc/kvm/book3s_hv_uvmem.c:1211:57: error: invalid use of undefined type 'struct dev_pagemap'
1211 | range_len(&kvmppc_uvmem_pgmap.range));
| ^
include/linux/ioport.h:278:85: note: in definition of macro 'release_mem_region'
278 | #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
| ^
arch/powerpc/kvm/book3s_hv_uvmem.c: At top level:
arch/powerpc/kvm/book3s_hv_uvmem.c:99:27: error: storage size of 'kvmppc_uvmem_pgmap' isn't known
99 | static struct dev_pagemap kvmppc_uvmem_pgmap;
| ^~~~~~~~~~~~~~~~~~
arch/powerpc/kvm/book3s_hv_uvmem.c:1026:37: error: storage size of 'kvmppc_uvmem_ops' isn't known
1026 | static const struct dev_pagemap_ops kvmppc_uvmem_ops = {
| ^~~~~~~~~~~~~~~~

Presumably caused by commit

5ba71dc7727a ("mm: don't include <linux/memremap.h> in <linux/mm.h>")

I applied the following patch:

From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Mon, 14 Feb 2022 17:47:53 +1100
Subject: [PATCH] fix for "mm: don't include <linux/memremap.h> in
<linux/mm.h>"

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
---
arch/powerpc/kvm/book3s_hv_uvmem.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c
index 8b6438fa18fc..8cabdb39cbbc 100644
--- a/arch/powerpc/kvm/book3s_hv_uvmem.c
+++ b/arch/powerpc/kvm/book3s_hv_uvmem.c
@@ -91,6 +91,7 @@
#include <linux/kvm_host.h>
#include <linux/ksm.h>
#include <linux/of.h>
+#include <linux/memremap.h>
#include <asm/ultravisor.h>
#include <asm/mman.h>
#include <asm/kvm_ppc.h>
--
2.34.1

--
Cheers,
Stephen Rothwell

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