- 19 Jan, 2004 40 commits
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> Mostly code pruning - a couple of adds due to the clean up
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> irq clean up and update
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> General xtalk.c clean up
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> shubio.c cleanup
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> General module.c clean up
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> More klgraph.c clean up Remove is_specified
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> klgraph.c clean up
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> New code for Opus and CGbrick More minor clean up
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> Fix the last patch - missed an IS_PIC_SOFT and needed the CG definition Header file clean up Added some __init definitions for functions that were init only Removed some 'porting' code - replaced it with linux calls/defintions Cleaned up some of the types we were using (ones that had been added) Fixed include files that had the wrong path in their ifdef'd names
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> Fix the last patch - missed an IS_PIC_SOFT and needed the CG definition
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> Remove the bridge and xbridge code - everything not PIC
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> General clean up of xbow.c
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> machvec/pci.c clean up Other clean up related to above
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> General code clean up of sn/io/io.c
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> Delete invent.h Delete sgi_if.c Cleaned up some of the NEW/DEL calls
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> Kill the arcs/*.h files Some general clean up on klconfig.h
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> Kill nag.h
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> Jesse Barnes <jbarnes@tomahawk.engr.sgi.com>
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> remove unused enum
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> kill $Id$
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> kill big endian stuff
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> namespace cleanup: ioerror_dump->sn_ioerror_dump
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> copyright update
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Andrew Morton authored
From: Pat Gefre <pfg@sgi.com> Some hwgraph code clean up
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Andrew Morton authored
From: "H. Peter Anvin" <hpa@zytor.com> Declaring a function to return a const scalar value is pretty meaningless. These functions are really trying to say that they don't alter any external state. Fix that up by using __attribute__((const)), if the compiler supports that.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> Fix endless loop in get_user_pages() on s390. It happens only on s/390 because pte_dirty always returns 0. For all other architectures this is an optimization. In the case of "write && !pte_dirty(pte)" follow_page() returns NULL. On all architectures except s390 handle_pte_fault() will then create a pte with pte_dirty(pte)==1 because write_access==1. In the following, second call to follow_page() all is fine. With the physical dirty bit patch pte_dirty() is always 0 for s/390 because the dirty bit doesn't live in the pte.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> while searching for a s390 tlb flush problem I noticed some superflous tlb flushes. One in zeromap_page_range, one in remap_page_range, and another one in filemap_sync. The patch just adds comments but I think these three flush_tlb_range calls can be removed.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> Ok, its just the revert of the page_cache_release delta.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> while working on my mm patch for s390 I played with rmap a bit, adding BUG statements and the like. While doing so I noticed some room for improvement in rmap. Its minor stuff but anyway... The first observation is that the pte chain array doesn't have holes, meaning that from the pte_chain_idx() of the first array every slot of all following pte chain arrays are full. That is there can't be NULL pointers. The "if (!pte_paddr)" check in try_to_unmap() can be removed and if the loop in page_referenced() is started from pte_chain_idx(pc) then the "if (!pte_paddr)" in page_referenced() can be removed as well. The second observation is that the first pte array of a pte chain has at least one entry. Empty pte chain arrays are always freed immediatly after the last entry was removed. Because of that victim_i can be calculated in a simpler way. Instead of setting victim_i to -1 and then check in each loop iteration against -1 victim_i can just be set to the pte_chain_idx of the first pte chain array.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> I think I found a potential race in install_page/install_file_pte. The inline function zap_pte releases pages by calling page_remove_rmap and page_cache_release. If this was the last user of a page it can get purged from the page cache and then get immediatly reused. But there might still be a tlb for this page on another cpu. The tlb is removed in the callers of zap_pte, install_page and install_file_pte, but this is too late. I admit that its a very unlikely race but never the less.. I fixed this by using the new ptep_clear_flush function that is introduced with the tlb flush optimization patch for s/390.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> this is another s/390 related mm patch. It introduces the concept of physical dirty and referenced bits into the common mm code. I always had the nagging feeling that the pte functions for setting/clearing the dirty and referenced bits are not appropriate for s/390. It works but it is a bit of a hack. After the wake of rmap it is now possible to put a much better solution into place. The idea is simple: since there are not dirty/referenced bits in the pte make these function nops on s/390 and add operations on the physical page to the appropriate places. For the referenced bit this is the page_referenced() function. For the dirty bit there are two relevant spots: in page_remove_rmap after the last user of the page removed its reverse mapping and in try_to_unmap after the last user was unmapped. There are two new functions to accomplish this: * page_test_and_clear_dirty: Test and clear the dirty bit of a physical page. This function is analog to ptep_test_and_clear_dirty but gets a struct page as argument instead of a pte_t pointer. * page_test_and_clear_young: Test and clear the referenced bit of a physical page. This function is analog to ptep_test_and_clear_young but gets a struct page as argument instead of a pte_t pointer. Its pretty straightforward and with it the s/390 mm makes much more sense. You'll need the tls flush optimization patch for the patch. Comments ?
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> On the s/390 architecture we still have the issue with tlb flushing and the ipte instruction. We can optimize the tlb flushing a lot with some minor interface changes between the arch backend and the memory management core. In the end the whole thing is about the Invalidate Page Table Entry (ipte) instruction. The instruction sets the invalid bit in the pte and removes the tlb for the page on all cpus for the virtual to physical mapping of the page in a particular address space. The nice thing is that only the tlb for this page gets removed, all the other tlbs stay valid. The reason we can't use ipte to implement flush_tlb_page() is one of the requirements of the instruction: the pte that should get flushed needs to be *valid*. I'd like to add the following four functions to the mm interface: * ptep_establish: Establish a new mapping. This sets a pte entry to a page table and flushes the tlb of the old entry on all cpus if it exists. This is more or less what establish_pte in mm/memory.c does right now but without the update_mmu_cache call. * ptep_test_and_clear_and_flush_young. Do what ptep_test_and_clear_young does and flush the tlb. * ptep_test_and_clear_and_flush_dirty. Do what ptep_test_and_clear_dirty does and flush the tlb. * ptep_get_and_clear_and_flush: Do what ptep_get_and_clear does and flush the tlb. The s/390 specific functions in include/pgtable.h define their own optimized version of these four functions by use of the ipte. I avoid the definition of these function for every architecture I added them to include/asm-generic/pgtable.h. Since i386/x86 and others don't include this header yet and define their own version of the functions found there I #ifdef'd all functions in include/asm-generic/pgtable.h to be able to pick the ones that are needed for each architecture (see patch for details). With the new functions in place it is easy to do the optimization, e.g. the sequence ptep_get_and_clear(ptep); flush_tlb_page(vma, address); gets replace by ptep_get_and_clear_and_flush(vma, address, ptep); The old sequence still works but it is suboptimal on s/390.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> - audit all 32 bit pointer accesses and make them use compat_ioctl(), because of the necessary conversion on s390 - introduce ULONG_IOCTL() which is used instead of COMPATIBLE_IOCTL() for all ioctls that have their argument encoded in 'arg' instead of the memory pointed to by arg. Same reason as above. - remove most #ifdefs in <linux/compat_ioctl.h>: They don't make any sense if the respective handlers in fs/compat_ioctl.c are not disabled as well and they are potentially harmful (the CONFIG_BLK_DEV_DM e.g. was insufficient). - comment out COMPATIBLE_IOCTL(SIOCSIFBR) and COMPATIBLE_IOCTL(SIOCGIFBR), they appear to require a handler - implement copy_in_user for s390, as needed for many handlers in fs/compat_ioctl.c - get rid of all duplicate stuff in arch/s390/kernel/compat_ioctl.c that is also in fs/compat_ioctl.c
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> - Add emulation for sys_fadvise64 and sys_fadvise64_64. - Use common code wrapper for sys_sched_setaffinity and sys_sched_getaffinity. - Remove unused put_rusage. - Add ssize_t checks for iovec lengths in do_readv_writev32. - Add emulation for posix timer system calls.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> New 3270 device driver.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> Remove all occurrences of __setup and #ifdef MODULE from the zfcp driver.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> - Adapt to notify api change in cio. - Add missing unregister_reboot_notifier() for error path. - Fix infinite error recovery escalation for certain port failures. - Fix reference counting. - Use GFP_ATOMIC for kmalloc while holding a spinlock. - Don't open adapter/port if unit/port is removed from configuration after it has already been closed. - Don't establish qdio queues if a port/unit is going to be removed. - Shutdown ports and units before removing them. - Use schedule_work for scsi_add_device. - Don't reopen nameserver port when an rscn was received. - Don't call scsi_done twice in zfcp_fsf_send_fcp_command_task_handler. - Get rid of scsi fake queue, scsi_reqs_active and scsi_reqs_active_wq. - Get rid of unused adapter status. - Allow enabling of scsi devices at boot time with zfcp_dev parameter. - Change name prefix from sg to sg_list for functions which work with the struct sg_list. - Don't call scsi_add_device from zfcp error recovery thread to avoid a deadlock if a scsi command sent during scsi_add_device fails. - Fix scsi i/o stall due to missing local-link-up event.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> - ctc/iucv: Add module author/description/license to fsm.c - ctc/lcs/iucv/qeth: Remove dst_link_failure calls because they can trigger a BUG in icmp.c. - ctc/iucv/qeth: Use s390_root_dev_{register,unregister} to fix reference counting for the group device sysfs root object. - ctc/lcs/qeth: Fix ccwgroup behaviour, remove should not imply offline. - ctc: Adapt to notify api change in cio. - ctc: Remove duplicate put_user. - iucv: Fix oops with empty netiucv peer name. - iucv: Use GFP_ATOMIC for kmalloc from tasklet. - iucv: Fix removal of attritubes. - qeth: Use correct length in clearing of MAC address. - qeth: Queue multicast and broadcast packets into the last queue on HiperSocket. - qeth: Reenable send control data after i/o error. - qeth: Find correct recbuf in qeth_send_control_data. - qeth: Handle VM startlan disabled. - qeth: Set flags for vipa entries. - qeth: Correct netmask on vipa setting. - qeth: Fix spinlock problems ("scheduling while atomic"). - qeth: Avoid setting multicast IP addresses several times. - qeth: Fix /proc/qeth format. - qeth: Fix race on device removal.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> - Add module license gpl. - Add debug messages. - Make blocksize persistent after close. Limit blocksize to 64k. - Check tape state against TS_INIT/TS_UNUSED for special case of medium sense and assign. - Assign tape as soon as they are set online and unassign when set offline. - Correct implementation of MT_EOD. - Add backward compatible tape.agent hotplug support (to be removed as soon as a full blown tape class is implemented). - Add state to differentiate between character device and block device access. - Make tape block device usable. - Add 34xx seek speedup code. - Fix device reference counting. - Fix online-offline-online cycle. - Add timeout to standard assign function. - Correct calculation of device index in tape_get_device(). - Check idal buffer for fixed block size reads and writes. - Adapt to notify api change in cio. - Add sysfs attributes for tape state, first minor, current operation and current blocksize.
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Andrew Morton authored
From: Martin Schwidefsky <schwidefsky@de.ibm.com> - Fix interrupt status examination. - Make dasd device attributes dependent on the devmap structure instead of the device structure to make them persistent and to be able to modify them in the offline state. - Allow changing the readonly attribute while dasd is online. - Add (diag) option to dasd= paramter. - Add missing spin_lock_init call. - Increase ref_count in dasd_device_from_cdev and add matching dasd_put_device pairs. - Adapt to notify api change in cio. - Fix bug in 3990 error recovery for cable pulls on ESS. - Replace kmap by page_address (no highmem on s/390). - Set correct default cache mode on ESS for eckd devices. - Change dasd names from "dasdx" to "dasd_<busid>_".
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