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* [PATCH] mv643xx_eth.c NULL noise removalAl Viro2006-12-04
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] __iomem annotations: smc91xAl Viro2006-12-04
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* [PATCH] fix fallout from header dependency trimmingAl Viro2006-12-04
| | | | | | | OK, that seems to be enough to deal with the mess. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* netfilter.h needs rcuupdate.h for RCU locking functionsLinus Torvalds2006-12-04
| | | | | | | | | This was exposed by Al's recent header file dependency reduction patches.. Cc: Al Viro <viro@ftp.linux.org.uk> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* Merge branch 'for-linus4' of ↵Linus Torvalds2006-12-04
|\ | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/viro/bird * 'for-linus4' of master.kernel.org:/pub/scm/linux/kernel/git/viro/bird: [PATCH] severing poll.h -> mm.h [PATCH] severing skbuff.h -> mm.h [PATCH] severing skbuff.h -> poll.h [PATCH] severing skbuff.h -> highmem.h [PATCH] severing uaccess.h -> sched.h [PATCH] severing fs.h, radix-tree.h -> sched.h [PATCH] severing module.h->sched.h
| * [PATCH] severing poll.h -> mm.hAl Viro2006-12-04
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * [PATCH] severing skbuff.h -> mm.hAl Viro2006-12-04
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * [PATCH] severing skbuff.h -> poll.hAl Viro2006-12-04
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * [PATCH] severing skbuff.h -> highmem.hAl Viro2006-12-04
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * [PATCH] severing uaccess.h -> sched.hAl Viro2006-12-04
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * [PATCH] severing fs.h, radix-tree.h -> sched.hAl Viro2006-12-04
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * [PATCH] severing module.h->sched.hAl Viro2006-12-04
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds2006-12-04
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6: [SUNHME]: Fix for sunhme failures on x86 [XFRM] xfrm_user: Better validation of user templates. [DCCP] tfrc: Binary search for reverse TFRC lookup [DCCP] ccid3: Deprecate TFRC_SMALLEST_P [DCCP] tfrc: Identify TFRC table limits and simplify code [DCCP] tfrc: Add protection against invalid parameters to TFRC routines [DCCP] tfrc: Fix small error in reverse lookup of p for given f(p) [DCCP] tfrc: Document boundaries and limits of the TFRC lookup table [DCCP] ccid3: Fix warning message about illegal ACK [DCCP] ccid3: Fix bug in calculation of send rate [DCCP]: Fix BUG in retransmission delay calculation [DCCP]: Use higher RTO default for CCID3
| * | [SUNHME]: Fix for sunhme failures on x86Jurij Smakov2006-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following patch fixes the failure of sunhme drivers on x86 hosts due to missing pci_enable_device() and pci_set_master() calls, lost during code refactoring. It has been filed as bugzilla bug #7502 [0] and Debian bug #397460 [1]. [0] http://bugzilla.kernel.org/show_bug.cgi?id=7502 [1] http://bugs.debian.org/397460 Signed-off-by: Jurij Smakov <jurij@wooyd.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | Merge master.kernel.org:/pub/scm/linux/kernel/git/acme/net-2.6David S. Miller2006-12-03
| |\ \
| | * | [DCCP] tfrc: Binary search for reverse TFRC lookupGerrit Renker2006-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This replaces the linear search algorithm for reverse lookup with binary search. It has the advantage of better scalability: O(log2(N)) instead of O(N). This means that the average number of iterations is reduced from 250 (linear search if each value appears equally likely) down to at most 9. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [DCCP] ccid3: Deprecate TFRC_SMALLEST_PGerrit Renker2006-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch deprecates the existing use of an arbitrary value TFRC_SMALLEST_P for low-threshold values of p. This avoids masking low-resolution errors. Instead, the code now checks against real boundaries (implemented by preceding patch) and provides warnings whenever a real value falls below the threshold. If such messages are observed, it is a better solution to take this as an indication that the lookup table needs to be re-engineered. Changelog: ---------- This patch * makes handling all TFRC resolution errors local to the TFRC library * removes unnecessary test whether X_calc is 'infinity' due to p==0 -- this condition is already caught by tfrc_calc_x() * removes setting ccid3hctx_p = TFRC_SMALLEST_P in ccid3_hc_tx_packet_recv since this is now done by the TFRC library * updates BUG_ON test in ccid3_hc_tx_no_feedback_timer to take into account that p now is either 0 (and then X_calc is irrelevant), or it is > 0; since the handling of TFRC_SMALLEST_P is now taken care of in the tfrc library Justification: -------------- The TFRC code uses a lookup table which has a bounded resolution. The lowest possible value of the loss event rate `p' which can be resolved is currently 0.0001. Substituting this lower threshold for p when p is less than 0.0001 results in a huge, exponentially-growing error. The error can be computed by the following formula: (f(0.0001) - f(p))/f(p) * 100 for p < 0.0001 Currently the solution is to use an (arbitrary) value TFRC_SMALLEST_P = 40 * 1E-6 = 0.00004 and to consider all values below this value as `virtually zero'. Due to the exponentially growing resolution error, this is not a good idea, since it hides the fact that the table can not resolve practically occurring cases. Already at p == TFRC_SMALLEST_P, the error is as high as 58.19%! Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [DCCP] tfrc: Identify TFRC table limits and simplify codeGerrit Renker2006-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This * adds documentation about the lowest resolution that is possible within the bounds of the current lookup table * defines a constant TFRC_SMALLEST_P which defines this resolution * issues a warning if a given value of p is below resolution * combines two previously adjacent if-blocks of nearly identical structure into one This patch does not change the algorithm as such. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [DCCP] tfrc: Add protection against invalid parameters to TFRC routinesGerrit Renker2006-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1) For the forward X_calc lookup, it * protects effectively against RTT=0 (this case is possible), by returning the maximal lookup value instead of just setting it to 1 * reformulates the array-bounds exceeded condition: this only happens if p is greater than 1E6 (due to the scaling) * the case of negative indices can now with certainty be excluded, since documentation shows that the formulas are within bounds * additional protection against p = 0 (would give divide-by-zero) 2) For the reverse lookup, it warns against * protects against exceeding array bounds * now returns 0 if f(p) = 0, due to function definition * warns about minimal resolution error and returns the smallest table value instead of p=0 [this would mask congestion conditions] Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [DCCP] tfrc: Fix small error in reverse lookup of p for given f(p)Gerrit Renker2006-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes the following small error in tfrc_calc_x_reverse_lookup. 1) The table is generated by the following equations: lookup[index][0] = g((index+1) * 1000000/TFRC_CALC_X_ARRSIZE); lookup[index][1] = g((index+1) * TFRC_CALC_X_SPLIT/TFRC_CALC_X_ARRSIZE); where g(q) is 1E6 * f(q/1E6) 2) The reverse lookup assigns an entry in lookup[index][small] 3) This index needs to match the above, i.e. * if small=0 then p = (index + 1) * 1000000/TFRC_CALC_X_ARRSIZE * if small=1 then p = (index+1) * TFRC_CALC_X_SPLIT/TFRC_CALC_X_ARRSIZE These are exactly the changes that the patch makes; previously the code did not conform to the way the lookup table was generated (this difference resulted in a mean error of about 1.12%). Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [DCCP] tfrc: Document boundaries and limits of the TFRC lookup tableGerrit Renker2006-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds documentation for the TCP Reno throughput equation which is at the heart of the TFRC sending rate / loss rate calculations. It spells out precisely how the values were determined and what they mean. The equations were derived through reverse engineering and found to be fully accurate (verified using test programs). This patch does not change any code. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [DCCP] ccid3: Fix warning message about illegal ACKGerrit Renker2006-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This avoids a (harmless) warning message being printed at the DCCP server (the receiver of a DCCP half connection). Incoming packets are both directed to * ccid_hc_rx_packet_recv() for the server half * ccid_hc_tx_packet_recv() for the client half The message gets printed since on a server the client half is currently not sending data packets. This is resolved for the moment by checking the DCCP-role first. In future times (bidirectional DCCP connections), this test may have to be more sophisticated. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [DCCP] ccid3: Fix bug in calculation of send rateGerrit Renker2006-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The main object of this patch is the following bug: ==> In ccid3_hc_tx_packet_recv, the parameters p and X_recv were updated _after_ the send rate was calculated. This is clearly an error and is resolved by re-ordering statements. In addition, * r_sample is converted from u32 to long to check whether the time difference was negative (it would otherwise be converted to a large u32 value) * protection against RTT=0 (this is possible) is provided in a further patch * t_elapsed is also converted to long, to match the type of r_sample * adds a a more debugging information regarding current send rates * various trivial comment/documentation updates Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [DCCP]: Fix BUG in retransmission delay calculationGerrit Renker2006-12-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This bug resulted in ccid3_hc_tx_send_packet returning negative delay values, which in turn triggered silently dequeueing packets in dccp_write_xmit. As a result, only a few out of the submitted packets made it at all onto the network. Occasionally, when dccp_wait_for_ccid was involved, this also triggered a bug warning since ccid3_hc_tx_send_packet returned a negative value (which in reality was a negative delay value). The cause for this bug lies in the comparison if (delay >= hctx->ccid3hctx_delta) return delay / 1000L; The type of `delay' is `long', that of ccid3hctx_delta is `u32'. When comparing negative long values against u32 values, the test returned `true' whenever delay was smaller than 0 (meaning the packet was overdue to send). The fix is by casting, subtracting, and then testing the difference with regard to 0. This has been tested and shown to work. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| | * | [DCCP]: Use higher RTO default for CCID3Gerrit Renker2006-12-03
| | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The TFRC nofeedback timer normally expires after the maximum of 4 RTTs and twice the current send interval (RFC 3448, 4.3). On LANs with a small RTT this can mean a high processing load and reduced performance, since then the nofeedback timer is triggered very frequently. This patch provides a configuration option to set the bound for the nofeedback timer, using as default 100 milliseconds. By setting the configuration option to 0, strict RFC 3448 behaviour can be enforced for the nofeedback timer. Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
| * / [XFRM] xfrm_user: Better validation of user templates.David S. Miller2006-12-03
| |/ | | | | | | | | | | | | | | | | | | | | Since we never checked the ->family value of templates before, many applications simply leave it at zero. Detect this and fix it up to be the pol->family value. Also, do not clobber xp->family while reading in templates, that is not necessary. Signed-off-by: David S. Miller <davem@davemloft.net>
* | [PATCH] Enable RAID autorun on Mac partition tables.David Woodhouse2006-12-04
| | | | | | | | | | Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6Linus Torvalds2006-12-04
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (34 commits) [S390] Don't use small stacks when lockdep is used. [S390] cio: Use device_reprobe() instead of bus_rescan_devices(). [S390] cio: Retry internal operations after vary off. [S390] cio: Use path verification for last path gone after vary off. [S390] non-unique constant/macro identifiers. [S390] Memory detection fixes. [S390] cio: Make ccw_dev_id_is_equal() more robust. [S390] Convert extmem spin_lock into a mutex. [S390] set KBUILD_IMAGE. [S390] lockdep: show held locks when showing a stackdump [S390] Add dynamic size check for usercopy functions. [S390] Use diag260 for memory size detection. [S390] pfault code cleanup. [S390] Cleanup memory_chunk array usage. [S390] Misaligned wait PSW at memory detection. [S390] cpu shutdown rework [S390] cpcmd <-> __cpcmd calling issues [S390] Bad kexec control page allocation. [S390] Reset infrastructure for re-IPL. [S390] Some documentation typos. ...
| * | [S390] Don't use small stacks when lockdep is used.Heiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | The lock dependency validator adds a bunch of extra stack frames to the stack, which can cause stack overflows. Especially seen on 31 bit where the small stack is only 4k. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cio: Use device_reprobe() instead of bus_rescan_devices().Cornelia Huck2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | In io_subchannel_register(), it is better to just reprobe the current device if it hasn't a driver yet than to rescan the whole bus. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cio: Retry internal operations after vary off.Cornelia Huck2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | If I/O was running on a just varied off chpid, it will be terminated. If this was a common I/O layer internal I/O, it needs to be retried. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cio: Use path verification for last path gone after vary off.Cornelia Huck2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the last path to a device is gone after a chpid has been varied off, putting it on the slow queue doesn't prevent a device driver from still attempting to use it (it may stay on the slow queue for a long time). Instead, trigger a verify event which will prevent I/O attempts from the device driver immediately. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] non-unique constant/macro identifiers.Ursula Braun2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add some prefixes to constands defined in drivers/s390/net/qdio.h and drivers/s390/lcs.h to make it possible to include the three header files drivers/s390/net/qeth.h, drivers/s390/net/qdio.h and drivers/net/s390/lcs.h in one C file. This is required for the patch that generates the kerntypes.o file for use by lcrash. Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Memory detection fixes.Heiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | VMALLOC_END on 31bit should be 0x8000000UL instead of 0x7fffffffL. The page mask which is used to make sure memory_end is on 4MB/2MB boundary is wrong and not needed. Therefore remove it. Make sure a vmalloc area does also exist and work on (future) machines with 4TB and more memory. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cio: Make ccw_dev_id_is_equal() more robust.Cornelia Huck2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | Using memcmp to compare ccw_dev_id implies that the whole structure (incl. padding) has always been completely initialized to sane values. Comparing the structures field by field doesn't make such assumptions. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Convert extmem spin_lock into a mutex.Heiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | There's no need to have a spin_lock here, but need sleepable context for vmem_map. Therefore convert the spin_lock into a mutex. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] set KBUILD_IMAGE.Christian Borntraeger2006-12-04
| | | | | | | | | | | | | | | | | | | | | Set KBUILD_IMAGE to a sane value. This enables "make rpm" Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] lockdep: show held locks when showing a stackdumpHeiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Follow i386/x86_64: lockdep can be used to print held locks when printing a backtrace. This can be useful when debugging things like 'scheduling while atomic' asserts. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Add dynamic size check for usercopy functions.Gerald Schaefer2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use a wrapper for copy_to/from_user to chose the best usercopy method. The mvcos instruction is better for sizes greater than 256 bytes, if mvcos is not available a page table walk is better for sizes greater than 1024 bytes. Also removed the redundant copy_to/from_user_std_small functions. Signed-off-by: Gerald Schaefer <geraldsc@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Use diag260 for memory size detection.Heiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Avoid the tprot loop if diag260 works and reports that there are no holes in memory. The tprot instruction can lead to a significant delay in the ipl process if the virtual guest has a lot of memory and the host is under memory pressure. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] pfault code cleanup.Heiko Carstens2006-12-04
| | | | | | | | | | | | | | | Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Cleanup memory_chunk array usage.Heiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | Need this at yet another file and don't want to add yet another extern... Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Misaligned wait PSW at memory detection.Heiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the memory detection code would ever reach the point where it would load the wait psw, it would generate a specification exception and the system would crash at ipl time. This is because of a misaligned wait psw. It needs to be on a double word boundary instead of a word boundary. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cpu shutdown reworkHeiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | Let one master cpu kill all other cpus instead of sending an external interrupt to all other cpus so they can kill themselves. Simplifies reipl/shutdown functions a lot. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] cpcmd <-> __cpcmd calling issuesHeiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of reipl cpcmd gets called when all other cpus are not running anymore. To prevent deadlocks change __cpcmd so that it doesn't take any locks and call cpcmd or __cpcmd, whatever is correct in the current context. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Bad kexec control page allocation.Heiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | KEXEC_CONTROL_MEMORY_LIMIT is an unsigned long value and therefore should be defined as one. Otherwise the kexec control page can be allocated above 2GB which will cause a specification exception on the sam31 instruction in the s390 kexec relocation code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Reset infrastructure for re-IPL.Heiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of re-IPL and diag308 doesn't work we have to reset all devices manually and wait synchronously that each reset finished. This patch adds the necessary infrastucture and the first exploiter of it. Subsystems that need to add a function that needs to be called at re-IPL may register/unregister this function via struct reset_call { struct reset_call *next; void (*fn)(void); }; void register_reset_call(struct reset_call *reset); void unregister_reset_call(struct reset_call *reset); When the registered function get called the context is: - all cpus beside the current one are stopped - all machine checks and interrupts are disabled - prefixing is disabled - a default machine check handler is available for use The registered functions may not take any locks are sleep. For the common I/O layer part of this patch: Introduce a reset_call css_reset that does the following: - clear all subchannels - perform a rchp on all channel paths and wait for the resulting machine checks This replaces the calls to clear_all_subchannels() and cio_reset_channel_paths() for kexec and ccw reipl. reipl_ccw_dev() now uses reipl_find_schid() to determine the subchannel id for a given device id. Also remove cio_reset_channel_paths() and friends since they are not needed anymore. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] Some documentation typos.Nicolas Kaiser2006-12-04
| | | | | | | | | | | | | | | Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] extmem unbalanced spin_lock.Heiko Carstens2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | segment save will exit with a lock held if the passed segment doesn't exist. Any subsequent call to segment_save will lead to a deadlock. Fix this and give up the lock before returning. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| * | [S390] return 'count' for successful execution of dasd_eer_enable.Horst Hummel2006-12-04
| | | | | | | | | | | | | | | | | | | | | | | | Currently the return value of 'dasd_eer_enable' is returned - even if the function returned '0'. Now return 'count' for successful execution. Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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