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path: root/drivers/s390/char/vmcp.c
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* [S390] convert vmcp printks to pr_xxx macros.Christian Borntraeger2008-12-251-3/+5
| | | | | Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmcp: remove BKLChristian Borntraeger2008-12-251-3/+0
| | | | | | | | | | | | The vmcp driver uses the session->mutex for concurrent access of the data structures. Therefore, the BKL in vmcp_open does not protect against any other function in the driver. The BLK in vmcp_open would protect concurrent access to the module init but all necessary steps ave finished before misc_register is called. We can safely remove the lock_kernel from vcmp. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* Merge branch 'bkl-removal' of git://git.lwn.net/linux-2.6Linus Torvalds2008-07-141-0/+4
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'bkl-removal' of git://git.lwn.net/linux-2.6: (146 commits) IB/umad: BKL is not needed for ib_umad_open() IB/uverbs: BKL is not needed for ib_uverbs_open() bf561-coreb: BKL unneeded for open() Call fasync() functions without the BKL snd/PCM: fasync BKL pushdown ipmi: fasync BKL pushdown ecryptfs: fasync BKL pushdown Bluetooth VHCI: fasync BKL pushdown tty_io: fasync BKL pushdown tun: fasync BKL pushdown i2o: fasync BKL pushdown mpt: fasync BKL pushdown Remove BKL from remote_llseek v2 Make FAT users happier by not deadlocking x86-mce: BKL pushdown vmwatchdog: BKL pushdown vmcp: BKL pushdown via-pmu: BKL pushdown uml-random: BKL pushdown uml-mmapper: BKL pushdown ...
| * vmcp: BKL pushdownArnd Bergmann2008-07-021-0/+4
| | | | | | | | Signed-off-by: Arnd Bergmann <arnd@arndb.de>
* | [S390] Cleanup vmcp printk messages.Christian Borntraeger2008-07-141-10/+5
| | | | | | | | | | | | Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
* | [S390] s390/vmcp: use simple_read_from_buffer()Akinobu Mita2008-07-141-14/+8
|/ | | | | | | | Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmcp cleanupChristian Borntraeger2007-07-171-38/+51
| | | | | | | | | | | | | | | | | | A number of small changes to vmcp: - Change preferred email address. - Use PRINT_xxx machros from debug.h like most s390 drivers, define "vmcp:" as PRINTK_HEADER and wrap error message at column 80. - Add error number to error message. - Update copyright, as I touched this file. - Small whitespace diff. - Use mutex instead of semaphore (Thanks Heiko for the patch) - Don't register debug feature on failure. - Check debug feature registration on init to avoid a potential oops on unload if the debug feature could not be registered--> 2 more messages. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] vmcp cleanupRobert P. J. Day2007-07-101-7/+6
| | | | | | | | No need to use the "&" prefix and, since you're calling nonseekable_open(), there is no need to use no_llseek(). Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [PATCH] mark struct file_operations const 5Arjan van de Ven2007-02-121-1/+1
| | | | | | | | | | | Many struct file_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [S390] locking problem with __cpcmd.Christian Borntraeger2007-01-091-1/+1
| | | | | | | | | Changeset 740b5706b9c4b3767f597b3ea76654c6f2a800b2 moved the protecting spinlock from __cpcmd to cpcmd. Therefore vmcp can no longer use __cpcmd, instead we have to use cpcmd. Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [S390] fix typo in vmcp.Christian Borntraeger2006-09-201-1/+1
| | | | | | | Fix comment typo in vmcp, it is z/VM and not v/VM. Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* [PATCH] s390: fix memory leak in vmcpChristian Borntraeger2005-11-071-1/+3
| | | | | | | | | | If vmcp is interrupted by a signal the vmcp command buffer is not freed. Found by Pete Zaitcev. Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: use __cpcmd in vmcp_writeChristian Borntraeger2005-07-271-3/+3
| | | | | | | | | | vmcp_write uses GPF_DMA for the memory allocation of the response buffer, so it can use the low level function __cpcmd directly, no need to call the wrapper. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: debug feature changesMichael Holzheu2005-06-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch changes the memory allocation method for the s390 debug feature. Trace buffers had been allocated using the get_free_pages() function before. Therefore it was not possible to get big memory areas in a running system due to memory fragmentation. Now the trace buffers are subdivided into several subbuffers with pagesize. Therefore it is now possible to allocate more memory for the trace buffers and more trace records can be written. In addition to that, dynamic specification of the size of the trace buffers is implemented. It is now possible to change the size of a trace buffer using a new debugfs file instance. When writing a number into this file, the trace buffer size is changed to 'number * pagesize'. In the past all the traces could be obtained from userspace by accessing files in the "proc" filesystem. Now with debugfs we have a new filesystem which should be used for debugging purposes. This patch moves the debug feature from procfs to debugfs. Since the interface of debug_register() changed, all device drivers, which use the debug feature had to be adjusted. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] s390: add vmcp interfaceChristian Borntraeger2005-06-251-0/+219
Add interface to issue VM control program commands. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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