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
..
compat_mq.c	ipc: initialize structure memory to zero for compat functions	2010-10-27 18:03:13 -07:00
compat.c	[PATCH v3] ipc: provide generic compat versions of IPC syscalls	2012-03-15 13:13:38 -04:00
ipc_sysctl.c	ipc: introduce shm_rmid_forced sysctl	2011-07-26 16:49:44 -07:00
ipcns_notifier.c	ipc: do not use a negative value to re-enable msgmni automatic recomputing	2008-07-25 10:53:42 -07:00
Makefile	Add generic sys_ipc wrapper	2010-03-12 15:52:32 -08:00
mq_sysctl.c	mqueue: separate mqueue default value from maximum value	2012-05-31 17:49:31 -07:00
mqueue.c	ipc/mqueue: add rbtree node caching support	2012-05-31 17:49:31 -07:00
msg.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
msgutil.c	security: trim security.h	2012-02-14 10:45:42 +11:00
namespace.c	userns: Use cred->user_ns instead of cred->user->user_ns	2012-04-07 16:55:51 -07:00
sem.c	ipc/sem.c: remove private structures from public header file	2011-11-02 16:07:01 -07:00
shm.c	ipc: shm: restore MADV_REMOVE functionality on shared memory segments	2012-06-07 14:43:55 -07:00
syscall.c	ppc64 sys_ipc breakage in 2.6.34-rc2	2010-03-22 09:57:19 -07:00
util.c	ipc,rcu: Convert call_rcu(ipc_immediate_free) to kfree_rcu()	2011-07-20 14:10:16 -07:00
util.h	userns: user namespaces: convert several capable() calls	2011-03-23 19:47:08 -07:00