The patch titled
nommu: fix SYSV SHM for NOMMU
has been added to the -mm tree. Its filename is
nommu-fix-sysv-shm-for-nommu.patch
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------------------------------------------------------
Subject: nommu: fix SYSV SHM for NOMMU
From: David Howells <dhowells@xxxxxxxxxx>
Commit c4caa778157dbbf04116f0ac2111e389b5cd7a29 ("file
->get_unmapped_area() shouldn't duplicate work of get_unmapped_area()")
broke SYSV SHM for NOMMU by taking away the pointer to
shm_get_unmapped_area() from shm_file_operations.
Put it back conditionally on CONFIG_MMU=n.
file->f_ops->get_unmapped_area() is used to find out the base address for a
mapping of a mappable chardev device or mappable memory-based file (such as a
ramfs file). It needs to be called prior to file->f_ops->mmap() being called.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Acked-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Greg Ungerer <gerg@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
ipc/shm.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN ipc/shm.c~nommu-fix-sysv-shm-for-nommu ipc/shm.c
--- a/ipc/shm.c~nommu-fix-sysv-shm-for-nommu
+++ a/ipc/shm.c
@@ -298,6 +298,9 @@ static const struct file_operations shm_
.mmap = shm_mmap,
.fsync = shm_fsync,
.release = shm_release,
+#ifndef CONFIG_MMU
+ .get_unmapped_area = shm_get_unmapped_area,
+#endif
};
static const struct file_operations shm_file_operations_huge = {
_
Patches currently in -mm which might be from dhowells@xxxxxxxxxx are
nommu-fix-sysv-shm-for-nommu.patch
nommu-struct-vm_regions-vm_usage-count-need-not-be-atomic.patch
nommu-remove-a-superfluous-check-of-vm_region-vm_usage.patch
nommu-dont-need-get_unmapped_area-for-nommu.patch
nommu-fix-race-between-ramfs-truncation-and-shared-mmap.patch
nommu-fix-shared-mmap-after-truncate-shrinkage-problems.patch
kernel-credc-use-kmem_cache_free.patch
nfs-avoid-warnings-when-config_nfs_v4=n.patch
frv-duplicate-output_buffer-of-e03.patch
coredump-unify-dump_seek-implementations-for-each-binfmt_c.patch
coredump-move-dump_write-and-dump_seek-into-a-header-file.patch
elf-coredump-replace-elf_core_extra_-macros-by-functions.patch
elf-coredump-make-offset-calculation-process-and-writing-process-explicit.patch
elf-coredump-add-extended-numbering-support.patch
mutex-subsystem-synchro-test-module.patch
mutex-subsystem-synchro-test-module-add-missing-header-file.patch
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