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* eCryptfs: replace magic numbersMichael Halcrow2007-10-16
| | | | | | | | Replace some magic numbers with sizeof() equivalents. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: remove unused functions and kmem_cacheMichael Halcrow2007-10-16
| | | | | | | | | The switch to read_write.c routines and the persistent file make a number of functions unnecessary. This patch removes them. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: initialize persistent lower file on inode createMichael Halcrow2007-10-16
| | | | | | | | Initialize persistent lower file on inode create. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: fix data typesMichael Halcrow2007-10-16
| | | | | | | | | Update data types and add casts in order to avoid potential overflow issues. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: convert mmap functions to use persistent fileMichael Halcrow2007-10-16
| | | | | | | | | | Convert readpage, prepare_write, and commit_write to use read_write.c routines. Remove sync_page; I cannot think of a good reason for implementing that in eCryptfs. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: make open, truncate, and setattr use persistent fileMichael Halcrow2007-10-16
| | | | | | | | | | | Rather than open a new lower file for every eCryptfs file that is opened, truncated, or setattr'd, instead use the existing lower persistent file for the eCryptfs inode. Change truncate to use read_write.c functions. Change ecryptfs_getxattr() to use the common ecryptfs_getxattr_lower() function. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: update metadata read/write functionsMichael Halcrow2007-10-16
| | | | | | | | | | | | Update the metadata read/write functions and grow_file() to use the read_write.c routines. Do not open another lower file; use the persistent lower file instead. Provide a separate function for crypto.c::ecryptfs_read_xattr_region() to get to the lower xattr without having to go through the eCryptfs getxattr. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: set up and destroy persistent lower fileMichael Halcrow2007-10-16
| | | | | | | | | This patch sets up and destroys the persistent lower file for each eCryptfs inode. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: replace encrypt, decrypt, and inode size writeMichael Halcrow2007-10-16
| | | | | | | | | Replace page encryption and decryption routines and inode size write routine with versions that utilize the read_write.c functions. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: read_write.c routinesMichael Halcrow2007-10-16
| | | | | | | | | | | | | | | | | Add a set of functions through which all I/O to lower files is consolidated. This patch adds a new inode_info reference to a persistent lower file for each eCryptfs inode; another patch later in this series will set that up. This persistent lower file is what the read_write.c functions use to call vfs_read() and vfs_write() on the lower filesystem, so even when reads and writes come in through aops->readpage and aops->writepage, we can satisfy them without resorting to direct access to the lower inode's address space. Several function declarations are going to be changing with this patchset. For now, in order to keep from breaking the build, I am putting dummy parameters in for those functions. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ecryptfs: fix error handlingMichael Halcrow2007-10-16
| | | | | | | | | | | | The error paths and the module exit code need work. sysfs unregistration is not the right place to tear down the crypto subsystem, and the code to undo subsystem initializations on various error paths is unnecessarily duplicated. This patch addresses those issues. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: remove assignments in if-statementsMichael Halcrow2007-10-16
| | | | | | | | Remove assignments in if-statements. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: remove header_extent_sizeMichael Halcrow2007-10-16
| | | | | | | | | | | | There is no point to keeping a separate header_extent_size and an extent_size. The total size of the header can always be represented as some multiple of the regular data extent size. [randy.dunlap@oracle.com: ecryptfs: fix printk format warning] Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: Use generic_file_splice_read()Michael Halcrow2007-10-16
| | | | | | | | | | | | | eCryptfs is currently just passing through splice reads to the lower filesystem. This is obviously incorrect behavior; the decrypted data is what needs to be read, not the lower encrypted data. I cannot think of any good reason for eCryptfs to implement splice_read, so this patch points the eCryptfs fops splice_read to use generic_file_splice_read. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Reviewed-by: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: make needlessly global symbols staticMichael Halcrow2007-10-16
| | | | | | | | | | | | | Andrew Morton wrote: > Please check that all the newly-added global symbols do indeed need > to be global. Change symbols in keystore.c and crypto.o to static if they do not need to be global. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: remove unnecessary variable initializationsMichael Halcrow2007-10-16
| | | | | | | | | | | | | | | | | Andrew Morton wrote: > > struct mutex *tfm_mutex = NULL; > > This initialisation looks like it's here to kill bogus gcc warning > (if it is, it should have been commented). Please investigate > uninitialized_var() and __maybe_unused sometime. Remove some unnecessary variable initializations. There may be a few more such intializations remaining in the code base; a future patch will take care of those. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: kerneldoc fixes for crypto.c and keystore.cMichael Halcrow2007-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Andrew Morton wrote: From: mhalcrow@us.ibm.com <mhalcrow@halcrow.austin.ibm.com> > > +/** > > + * decrypt_passphrase_encrypted_session_key - Decrypt the session key > > + * with the given auth_tok. > > * > > * Returns Zero on success; non-zero error otherwise. > > */ > > That comment purports to be a kerneldoc-style comment. But > > - kerneldoc doesn't support multiple lines on the introductory line > which identifies the name of the function (alas). So you'll need to > overflow 80 cols here. > > - the function args weren't documented > > But the return value is! People regularly forget to do that. And > they frequently forget to document the locking prerequisites and the > permissible calling contexts (process/might_sleep/hardirq, etc) > > (please check all ecryptfs kerneldoc for this stuff sometime) This patch cleans up some of the existing comments and makes a couple of line break tweaks. There is more work to do to bring eCryptfs into full kerneldoc-compliance. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: comments for some structsMichael Halcrow2007-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Andrew Morton wrote: > > +struct ecryptfs_global_auth_tok { > > +#define ECRYPTFS_AUTH_TOK_INVALID 0x00000001 > > + u32 flags; > > + struct list_head mount_crypt_stat_list; > > + struct key *global_auth_tok_key; > > + struct ecryptfs_auth_tok *global_auth_tok; > > + unsigned char sig[ECRYPTFS_SIG_SIZE_HEX + 1]; > > +}; > > + > > +struct ecryptfs_key_tfm { > > + struct crypto_blkcipher *key_tfm; > > + size_t key_size; > > + struct mutex key_tfm_mutex; > > + struct list_head key_tfm_list; > > + unsigned char cipher_name[ECRYPTFS_MAX_CIPHER_NAME_SIZE + 1]; > > +}; > > Please consider commenting your struct fields carefully: it's a > great way to help other to understand your code. Add some comments to the ecryptfs_global_auth_tok and ecryptfs_key_tfm structs to make their functions more easily ascertained. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: grammatical fix (destruct to destroy)Michael Halcrow2007-10-16
| | | | | | | | | | | | | Andrew Morton wrote: > > +int ecryptfs_destruct_crypto(void) > > ecryptfs_destroy_crypto would be more grammatically correct ;) Grammatical fix for some function names. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: collapse flag set into one statementMichael Halcrow2007-10-16
| | | | | | | | | | | | | | | | Andrew Morton wrote: > > + crypt_stat->flags |= ECRYPTFS_ENCRYPTED; > > + crypt_stat->flags |= ECRYPTFS_KEY_VALID; > > Maybe the compiler can optimise those two statements, but we'd > normally provide it with some manual help. This patch provides the compiler with some manual help for optimizing the setting of some flags. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: remove unnecessary BUG_ONMichael Halcrow2007-10-16
| | | | | | | | | | | | | | | | | | | Andrew Morton wrote: > > + mutex_lock(&mount_crypt_stat->global_auth_tok_list_mutex); > > + BUG_ON(mount_crypt_stat->num_global_auth_toks == 0); > > + mutex_unlock(&mount_crypt_stat->global_auth_tok_list_mutex); > > That's odd-looking. If it was a bug for num_global_auth_toks to be > zero, and if that mutex protects num_global_auth_toks then as soon > as the lock gets dropped, another thread can make > num_global_auth_toks zero, hence the bug is present. Perhaps? That was serving as an internal sanity check that should not have made it into the final patch set in the first place. This patch removes it. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ecryptfs: printk warning fixesAndrew Morton2007-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | fs/ecryptfs/keystore.c: In function 'parse_tag_1_packet': fs/ecryptfs/keystore.c:557: warning: format '%d' expects type 'int', but argument 2 has type 'size_t' fs/ecryptfs/keystore.c: In function 'parse_tag_3_packet': fs/ecryptfs/keystore.c:690: warning: format '%d' expects type 'int', but argument 2 has type 'size_t' fs/ecryptfs/keystore.c: In function 'parse_tag_11_packet': fs/ecryptfs/keystore.c:836: warning: format '%d' expects type 'int', but argument 2 has type 'size_t' fs/ecryptfs/keystore.c: In function 'write_tag_1_packet': fs/ecryptfs/keystore.c:1413: warning: format '%d' expects type 'int', but argument 2 has type 'size_t' fs/ecryptfs/keystore.c:1413: warning: format '%d' expects type 'int', but argument 3 has type 'long unsigned int' fs/ecryptfs/keystore.c: In function 'write_tag_11_packet': fs/ecryptfs/keystore.c:1472: warning: format '%d' expects type 'int', but argument 2 has type 'size_t' fs/ecryptfs/keystore.c: In function 'write_tag_3_packet': fs/ecryptfs/keystore.c:1663: warning: format '%d' expects type 'int', but argument 2 has type 'size_t' fs/ecryptfs/keystore.c:1663: warning: format '%d' expects type 'int', but argument 3 has type 'long unsigned int' fs/ecryptfs/keystore.c: In function 'ecryptfs_generate_key_packet_set': fs/ecryptfs/keystore.c:1778: warning: passing argument 2 of 'write_tag_11_packet' from incompatible pointer type fs/ecryptfs/main.c: In function 'ecryptfs_parse_options': fs/ecryptfs/main.c:363: warning: format '%d' expects type 'int', but argument 3 has type 'size_t' Cc: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: update comment and debug statementMichael Halcrow2007-10-16
| | | | | | | | Trivial updates to comment and debug statement. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: fix Tag 11 writing codeMichael Halcrow2007-10-16
| | | | | | | | | | | | | | Fix up the Tag 11 writing code to handle size limits and boundaries more explicitly. It looks like the packet length was 1 shorter than it should have been, chopping off the last byte of the key identifier. This is largely inconsequential, since it is not much more likely that a key identifier collision will occur with 7 bytes rather than 8. This patch fixes the packet to use the full number of bytes that were originally intended to be used for the key identifier. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: fix Tag 11 parsing codeMichael Halcrow2007-10-16
| | | | | | | | | | Fix up the Tag 11 parsing code to handle size limits and boundaries more explicitly. Pay attention to *8* bytes for the key identifier (literal data), no more, no less. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: fix Tag 3 parsing codeMichael Halcrow2007-10-16
| | | | | | | | | Fix up the Tag 3 parsing code to handle size limits and boundaries more explicitly. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: fix Tag 1 parsing codeMichael Halcrow2007-10-16
| | | | | | | | | | Fix up the Tag 1 parsing code to handle size limits and boundaries more explicitly. Initialize the new auth_tok's flags. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Cc: Josef Sipek <jsipek@fsl.cs.sunysb.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: kmem_cache objects for multiple keys; init/exit functionsMichael Halcrow2007-10-16
| | | | | | | | | | Introduce kmem_cache objects for handling multiple keys per inode. Add calls in the module init and exit code to call the key list initialization/destruction functions. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: use list_for_each_entry_safe() when wiping auth toksMichael Halcrow2007-10-16
| | | | | | | | Use list_for_each_entry_safe() when wiping the authentication token list. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* eCryptfs: add key list structure; search keyringMichael Halcrow2007-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | Add support structures for handling multiple keys. The list in crypt_stat contains the key identifiers for all of the keys that should be used for encrypting each file's File Encryption Key (FEK). For now, each inode inherits this list from the mount-wide crypt_stat struct, via the ecryptfs_copy_mount_wide_sigs_to_inode_sigs() function. This patch also removes the global key tfm from the mount-wide crypt_stat struct, instead keeping a list of tfm's meant for dealing with the various inode FEK's. eCryptfs will now search the user's keyring for FEK's parsed from the existing file metadata, so the user can make keys available at any time before or after mounting. Now that multiple FEK packets can be written to the file metadata, we need to be more meticulous about size limits. The updates to the code for writing out packets to the file metadata makes sizes and limits more explicit, uniformly expressed, and (hopefully) easier to follow. Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Cc: "Serge E. Hallyn" <serge@hallyn.com> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fs/nfsd/export.c: make 3 functions staticAdrian Bunk2007-10-16
| | | | | | | | | | | | | This patch makes the following needlessly global functions static: - exp_get_by_name() - exp_parent() - exp_find() Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Neil Brown <neilb@suse.de> Cc: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* isdn: guard against a potential NULL pointer dereference in ↵Jesper Juhl2007-10-16
| | | | | | | | | | | | | | | old_capi_manufacturer() In drivers/isdn/capi/kcapi.c::old_capi_manufacturer(), if the call to get_capi_ctr_by_nr(ldef.contr); in line 823 returns NULL, then we'll be dereferencing a NULL pointer in the very next line. (Found by Coverity checker as bug #402) Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fix possible NULL deref on low memory condition in capidrv.c::send_message()Jesper Juhl2007-10-16
| | | | | | | | | | | | | | | | If we fail to allocate an skb in drivers/isdn/capi/capidrv.c::send_message(), then we'll end up dereferencing a NULL pointer. Since out of memory conditions are not unheard of, I believe it is better to print a error message and just return rather than bring down the whole kernel. Sure, doing this may upset some application, but that's still better than crashing the whole system. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* use mutex instead of semaphore in isdn subsystem common functionsMatthias Kaehlcke2007-10-16
| | | | | | | | | | The ISDN subsystem common functions use a semaphore as mutex. Use the mutex API instead of the (binary) semaphore. Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* gigaset: remove pointless lockingTilman Schmidt2007-10-16
| | | | | | | | | | Remove pointless taking of spinlock around reading a single pointer-sized or smaller variable. Signed-off-by: Tilman Schmidt <tilman@imap.cc> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* kprobes: support kretprobe blacklistMasami Hiramatsu2007-10-16
| | | | | | | | | | | | | | | | | Introduce architecture dependent kretprobe blacklists to prohibit users from inserting return probes on the function in which kprobes can be inserted but kretprobes can not. This patch also removes "__kprobes" mark from "__switch_to" on x86_64 and registers "__switch_to" to the blacklist on x86-64, because that mark is to prohibit user from inserting only kretprobe. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* spi doesn't need class_deviceTony Jones2007-10-16
| | | | | | | | | | | | Make the SPI framework and drivers stop using class_device. Update docs accordingly ... highlighting just which sysfs paths should be "safe"/stable. Signed-off-by: Tony Jones <tonyj@suse.de> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Documentation/spi/spidev_test.c: constify some variablesWANG Cong2007-10-16
| | | | | | | | | | Constify two char pointers and a struct in Documentation/spi/spidev_test.c. Acked-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* spi_mpc83xx handles other processors with QUICC engineAnton Vorontsov2007-10-16
| | | | | | | | | | | | | Currently, all QE SPI controllers are almost the same comparing to MPC83xx's, thus let's use that driver for them. Tested to work on MPC85xx in loopback mode. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* SPI driver runtime footprint shrinkageDavid Brownell2007-10-16
| | | | | | | | | | | | | | | | | | | | | | Shrink the runtime footprint of various SPI drivers: - Move the probe() routine into the init section where practical, using platform_driver_probe() to make that safe. This often saves around 1KB. Using platform_driver_probe() can also be a correctness fix, if the probe routine is already marked __init but the driver struct keeps a dangling pointer to it after init section removal. - Likewise move remove() routines into the exit sections. These changes would be inappropriate iff the platform devices were actually hotpluggable (e.g. they're found on optional addon cards, or in an FPGA that's dynamically reprogrammed). In these cases, that's not the situation; it's an SOC controller and the only device is initialized before these drivers. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* OMAP2 McSPI code cleanupKyungmin Park2007-10-16
| | | | | | | | | Remove unused variable & write space Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Clean up duplicate includes in drivers/spi/Jesper Juhl2007-10-16
| | | | | | | | | | This patch cleans up duplicate includes in drivers/spi/ Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* cpuset: remove sched domain hooks from cpusetsPaul Jackson2007-10-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove the cpuset hooks that defined sched domains depending on the setting of the 'cpu_exclusive' flag. The cpu_exclusive flag can only be set on a child if it is set on the parent. This made that flag painfully unsuitable for use as a flag defining a partitioning of a system. It was entirely unobvious to a cpuset user what partitioning of sched domains they would be causing when they set that one cpu_exclusive bit on one cpuset, because it depended on what CPUs were in the remainder of that cpusets siblings and child cpusets, after subtracting out other cpu_exclusive cpusets. Furthermore, there was no way on production systems to query the result. Using the cpu_exclusive flag for this was simply wrong from the get go. Fortunately, it was sufficiently borked that so far as I know, almost no successful use has been made of this. One real time group did use it to affectively isolate CPUs from any load balancing efforts. They are willing to adapt to alternative mechanisms for this, such as someway to manipulate the list of isolated CPUs on a running system. They can do without this present cpu_exclusive based mechanism while we develop an alternative. There is a real risk, to the best of my understanding, of users accidentally setting up a partitioned scheduler domains, inhibiting desired load balancing across all their CPUs, due to the nonobvious (from the cpuset perspective) side affects of the cpu_exclusive flag. Furthermore, since there was no way on a running system to see what one was doing with sched domains, this change will be invisible to any using code. Unless they have real insight to the scheduler load balancing choices, they will be unable to detect that this change has been made in the kernel's behaviour. Initial discussion on lkml of this patch has generated much comment. My (probably controversial) take on that discussion is that it has reached a rough concensus that the current cpuset cpu_exclusive mechanism for defining sched domains is borked. There is no concensus on the replacement. But since we can remove this mechanism, and since its continued presence risks causing unwanted partitioning of the schedulers load balancing, we should remove it while we can, as we proceed to work the replacement scheduler domain mechanisms. Signed-off-by: Paul Jackson <pj@sgi.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Christoph Lameter <clameter@engr.sgi.com> Cc: Dinakar Guniguntala <dino@in.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* I/OAT: Add DCA servicesShannon Nelson2007-10-16
| | | | | | | | | | | | | | Add code to connect to the DCA driver and provide cpu tags for use by drivers that would like to use Direct Cache Access hints. [Adrian Bunk] Several Kconfig cleanup items [Andrew Morten, Chris Leech] Fix for using cpu_physical_id() even when built for uni-processor Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* DCA: Add Direct Cache Access driverShannon Nelson2007-10-16
| | | | | | | | | | | | | | | | | | | | | | Direct Cache Access (DCA) is a method for warming the CPU cache before data is used, with the intent of lessening the impact of cache misses. This patch adds a manager and interface for matching up client requests for DCA services with devices that offer DCA services. In order to use DCA, a module must do bus writes with the appropriate tag bits set to trigger a cache read for a specific CPU. However, different CPUs and chipsets can require different sets of tag bits, and the methods for determining the correct bits may be simple hardcoding or may be a hardware specific magic incantation. This interface is a way for DCA clients to find the correct tag bits for the targeted CPU without needing to know the specifics. [Dave Miller] use DEFINE_SPINLOCK() Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* I/OAT: Add support for MSI and MSI-XShannon Nelson2007-10-16
| | | | | | | | | | | Add support for MSI and MSI-X interrupt handling, including the ability to choose the desired interrupt method. Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Acked-by: David S. Miller <davem@davemloft.net> [bunk@kernel.org: drivers/dma/ioat_dma.c: make 3 functions static] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* I/OAT: Split PCI startup from DMA handling codeShannon Nelson2007-10-16
| | | | | | | | | | | | | Split the general PCI startup from the DMA handling code in order to prepare for adding support for DCA services and future versions of the ioatdma device. [Rusty Russell] Removal of __unsafe() usage. Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* I/OAT: code cleanup from checkpatch outputShannon Nelson2007-10-16
| | | | | | | | | Take care of a bunch of little code nits in ioatdma files Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* I/OAT: Rename the source fileShannon Nelson2007-10-16
| | | | | | | | | | Rename the ioatdma.c file in preparation for splitting into multiple files, which will allow for easier adding new functionality. Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* I/OAT: New device idsShannon Nelson2007-10-16
| | | | | | | | | Add device ids for new revs of the Intel I/OAT DMA engine Signed-off-by: Shannon Nelson <shannon.nelson@intel.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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