- 11 Jan, 2006 8 commits
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Stephen Rothwell authored
Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
Paul Mackerras <paulus@samba.org>
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Anton Blanchard authored
The current ppc64 per cpu data implementation is quite slow. eg: lhz 11,18(13) /* smp_processor_id() */ ld 9,.LC63-.LCTOC1(30) /* per_cpu__variable_name */ ld 8,.LC61-.LCTOC1(30) /* __per_cpu_offset */ sldi 11,11,3 /* form index into __per_cpu_offset */ mr 10,9 ldx 9,11,8 /* __per_cpu_offset[smp_processor_id()] */ ldx 0,10,9 /* load per cpu data */ 5 loads for something that is supposed to be fast, pretty awful. One reason for the large number of loads is that we have to synthesize 2 64bit constants (per_cpu__variable_name and __per_cpu_offset). By putting __per_cpu_offset into the paca we can avoid the 2 loads associated with it: ld 11,56(13) /* paca->data_offset */ ld 9,.LC59-.LCTOC1(30) /* per_cpu__variable_name */ ldx 0,9,11 /* load per cpu data Longer term we can should be able to do even better than 3 loads. If per_cpu__variable_name wasnt a 64bit constant and paca->data_offset was in a register we could cut it down to one load. A suggestion from Rusty is to use gcc's __thread extension here. In order to do this we would need to free up r13 (the __thread register and where the paca currently is). So far Ive had a few unsuccessful attempts at doing that :) The patch also allocates per cpu memory node local on NUMA machines. This patch from Rusty has been sitting in my queue _forever_ but stalled when I hit the compiler bug. Sorry about that. Finally I also only allocate per cpu data for possible cpus, which comes straight out of the x86-64 port. On a pseries kernel (with NR_CPUS == 128) and 4 possible cpus we see some nice gains: total used free shared buffers cached Mem: 4012228 212860 3799368 0 0 162424 total used free shared buffers cached Mem: 4016200 212984 3803216 0 0 162424 A saving of 3.75MB. Quite nice for smaller machines. Note: we now have to be careful of per cpu users that touch data for !possible cpus. At this stage it might be worth making the NUMA and possible cpu optimisations generic, but per cpu init is done so early we have to be careful that all architectures have their possible map setup correctly. Signed-off-by:Anton Blanchard <anton@samba.org> Signed-off-by:
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Michael Neuling authored
This stops parport from accessing nonexistent parallel ports. Signed-off-by:
Michael Neuling <mikey@neuling.org> Signed-off-by:
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Michael Ellerman authored
This patch adds Kconfig entries to control the early debugging options, currently in setup_64.c. Doing this via Kconfig rather than #defines means you can have one source tree, which is buildable for multiple platforms - and you can enable the correct early debug option for each platform via .config. I made udbg_early_init() a static inline because otherwise GCC is to daft to optimise it away when debugging is off. Now that we have udbg_init_rtas() we can make call_rtas_display_status* static. Signed-off-by:
Michael Ellerman <michael@ellerman.id.au> Signed-off-by:
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Michael Ellerman authored
Connect iSeries up to the standard early debugging infrastructure. To actually use this you need to enable the iSeries early debugging in setup_64.c. Then after the messages are logged hit Ctrl-x Ctrl-x on your console to dump the Hypervisor console buffer. Signed-off-by:
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Olaf Hering authored
remove remaining crash_notes definition to fix compile error /dev/shm/linux-2.6/arch/powerpc/kernel/machine_kexec.c:21: error: conflicting types for `crash_notes' /dev/shm/linux-2.6/include/linux/kexec.h:129: error: previous declaration of `crash_notes' Signed-off-by:
Olaf Hering <olh@suse.de> Signed-off-by:
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linas authored
The RPAPHP hoplug driver will not build as a module, because it calls on a pcibios routine which is not exported. This exports the symbol. Problem reported by Olaf Hering <olh@suse.de> Signed-off-by:
Linas Vepstas <linas@austin.ibm.com> Signed-off-by:
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Olaf Hering authored
Enable the RTC driver. Signed-off-by:
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- 10 Jan, 2006 32 commits
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Ingo Molnar authored
Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Linus Torvalds authored
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Ingo Molnar authored
Mark mutex_lock() and mutex_lock_interruptible() as might_sleep() functions. Signed-off-by:
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Ingo Molnar authored
Call the mutex slowpath more conservatively - e.g. FRAME_POINTERS can change the calling convention, in which case a direct branch to the slowpath becomes illegal. Bug found by Hugh Dickins. Signed-off-by:
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Ingo Molnar authored
Remove unnecessary (and incorrect) inclusion of asm/mutex.h, pointed out by David Howells. Signed-off-by:
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Bart De Schuymer authored
Signed-off-by:
Bart De Schuymer <bdschuym@pandora.be> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Adrian Bunk authored
Jean-Luc Leger <reiga@dspnet.fr.eu.org> reported this alternative dependency on a non-existing symbol. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Adrian Bunk authored
EXPORT_SYMBOL's do nowadays belong to the files where the actual functions are. Moving the module_init/module_exit to the file with the actual functions has the advantage of saving a few bytes due to the removal of two functions. Signed-off-by:
Jean Tourrilhes <jt@hpl.hp.com> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
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Jesper Juhl authored
Small cleanups for drivers/atm/zatm.c Get rid of unneeded cast of kmalloc() return value. Small whitespace/CodingStyle/formatting cleanup (since I was in there anyway). Signed-off-by:
Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by:
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Jesper Juhl authored
Get rid of needless casting of kmalloc() return value in net/ Signed-off-by:
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Jesper Juhl authored
Decrease the number of pointer derefs in net/rxrpc/connection.c Benefits of the patch: - Fewer pointer dereferences should make the code slightly faster. - Size of generated code is smaller - improved readability Signed-off-by:
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Martin Murray authored
From: Martin Murray <murrayma@citi.umich.edu> Sanity check nlmsg_len during netlink_rcv_skb. An nlmsg_len == 0 can cause infinite loop in kernel, effectively DoSing machine. Noted by Matin Murray. Signed-off-by:
Chris Wright <chrisw@sous-sol.org> Signed-off-by:
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Patrick McHardy authored
The connection tracking timeout variables are unsigned long, but proc_dointvec_jiffies is used with sizeof(unsigned int) in the sysctl tables. Since there is no proc_doulongvec_jiffies function, change the timeout variables to unsigned int. Signed-off-by:
Patrick McHardy <kaber@trash.net> Signed-off-by:
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Patrick McHardy authored
->print and ->print_range are not used (and apparently never were). Signed-off-by:
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Patrick McHardy authored
ip_nat_mangle_tcp_packet doesn't return NF_* values but 0/1 for failure/success. Signed-off-by:
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Patrick McHardy authored
The PPTP NAT helper calculates the offset at which the packet needs to be mangled as difference between two pointers to the header. With non-linear skbs however the pointers may point to two seperate buffers on the stack and the calculation results in a wrong offset beeing used. Signed-off-by:
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Patrick McHardy authored
When an inbound PPTP_IN_CALL_REQUEST packet is received the PPTP NAT helper uses a NULL pointer in pointer arithmentic to calculate the offset in the packet which needs to be mangled and corrupts random memory or crashes. Signed-off-by:
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Patrick McHardy authored
Don't wrap entire file in #ifdef CONFIG_NETFILTER, remove a few unneccessary includes. Signed-off-by:
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Kris Katterjohn authored
This changes some memcmp(one,two,ETH_ALEN) to compare_ether_addr(one,two). Signed-off-by:
Kris Katterjohn <kjak@users.sourceforge.net> Signed-off-by:
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Stephen Hemminger authored
The congestion ops and af_ops in the inet_connection_sock can be const. Signed-off-by:
Stephen Hemminger <shemminger@osdl.org> Signed-off-by:
Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by:
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Alan Cox authored
This requires the proper capabilities for the moxa bios update ioctl's. Signed-off-by: -
Greg Ungerer authored
Fix a5 register corruption when processing user space signals handlers. We need to save a5 through each contenxt change. Signed-off-by:
Greg Ungerer <gerg@uclinux.org> Signed-off-by:
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Greg Ungerer authored
We're starting a number of big applications (memory footprint app. 1MByte) on our Arcturus uC5272. Therefore memory fragmentation is a real pain for us. We've switched to uClinux-2.4.27-uc1 and found that page_alloc2 fragments the memory heavily. Digging into it we found a bug in the find_next_zero_bit function in the m68knommu/bitops.h file. if the size isn't a multiple of 32 than the upper bits of the last word to be searched should be masked. But the functions masks the lower bits of the last word because it uses a right shift instead of a left shift operator. Patch submitted by Sascha Smejkal <s.smejkal@centersystems.at> Signed-off-by:
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Greg Ungerer authored
Modify the initial trace output (which is based on flags in the binary header) so that it is not done until after the magic number check. This may well not be a flat format binary, so the flags could be invalid. (Prime example, running a script). Changes prompted by patches from Stuart Hughs. Signed-off-by:
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Greg Ungerer authored
Set the hardware interrupt priority to a different value for each attached ColdFire serial port. According to the CPU documentation you should not use the same combination of level/priority on more than one device. People have reported odd serial port behavior with them set the same. Signed-off-by:
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Greg Ungerer authored
Allow the ColdFire FEC ethernet driver to be enabled on the M520x CPU family. Signed-off-by:
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Greg Ungerer authored
Adjust length of M5208EVB ram define. It should size up to 32MB after adding in the dBUG reserved 128k. Problem pointed out be Milton Miller <miltonm@bga.com>. Signed-off-by:
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Greg Ungerer authored
This is a patch adapted from a posting by Andrea Tarani which was pointed out to me by Bernardo Innocenti. Thanks to both of them for their help and patience. The original posting is here: http://mailman.uclinux.org/pipermail/uclinux-dev/2005-July/033543.html The problem first manifest itself as busybox ping terminating with an "Illegal instruction". I reduced this to a test case and found that variable size arrays allocated on the stack could lead to stacks not aligned on 32 bit boundaries. For the Coldfire this proved fatal. Having been pointed out this patch by Bernardo, I applied it and it fixed the first test case. I then went back to busybox's ping. This still failed with "Illegal instruction", but in a different way. Before it depended on the size allocated for the ping buffer, now it happened every time. I also found it depended on optimisation level (gcc-3.4.0) -Os was okay but not -O2. After a lot of looking, it turned out that register a5 was being corrupted by the signal handler (after applying the patch). I re-worked the patch a bit to save/restore a5 and now all seems well. Patch submitted by Stuart Hughs <stuarth@freescale.com> Signed-off-by:
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Greg Ungerer authored
Fix broken "truct" -> "struct" in arch_ptrace() parameter list. Signed-off-by:
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Greg Ungerer authored
Don't specify compiler optimization flags in the m68knommu Makefile. Let the top level Makefile/config set it. Signed-off-by:
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Greg Ungerer authored
Remove obsolete MAGIC_ROM_PTR code from h8300 architecture. Signed-off-by:
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Greg Ungerer authored
Remove obsolete MAGIC_ROM_PTR code from h8300 architecture. Signed-off-by:
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