Will Deacon 7d8a45695c ipc: shm: restore MADV_REMOVE functionality on shared memory segments ... Commit 17cf28afea ("mm/fs: remove truncate_range") removed the truncate_range inode operation in favour of the fallocate file operation. When using SYSV IPC shared memory segments, calling madvise with the MADV_REMOVE advice on an area of shared memory will attempt to invoke the .fallocate function for the shm_file_operations, which is NULL and therefore returns -EOPNOTSUPP to userspace. The previous behaviour would inherit the inode_operations from the underlying tmpfs file and invoke truncate_range there. This patch restores the previous behaviour by wrapping the underlying fallocate function in shm_fallocate, as we do for fsync. [hughd@google.com: use -ENOTSUPP in shm_fallocate()] Signed-off-by: Will Deacon <will.deacon@arm.com> Acked-by: Hugh Dickins <hughd@google.com> Signed-off-by: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-06-07 14:43:55 -07:00
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compat_mq.c
compat.c
ipc_sysctl.c
ipcns_notifier.c
Makefile
mq_sysctl.c
mqueue.c	ipc/mqueue: add rbtree node caching support	2012-05-31 17:49:31 -07:00
msg.c
msgutil.c
namespace.c
sem.c
shm.c	ipc: shm: restore MADV_REMOVE functionality on shared memory segments	2012-06-07 14:43:55 -07:00
syscall.c
util.c
util.h