- 01 Nov, 2005 3 commits
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Lennert Buytenhek authored
Patch from Lennert Buytenhek Switch the users of ixp2000_reg_write that depend on writes being flushed out of the write buffer by the time that function returns over to ixp2000_reg_wrb. When using XCB=101, writes to the same functional unit are still guaranteed to complete in order, so we only need to protect against: - reordering of writes to different functional units - masking an interrupt and then reenabling the IRQ bit in CPSR Signed-off-by:
Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by:
Deepak Saxena <dsaxena@plexity.net> Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk>
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Lennert Buytenhek authored
Patch from Lennert Buytenhek On the ixdp2x00, the slave CPU is currently not allowed to reset itself for fear that it will do something 'funky' on the PCI bus. This fear is ungrounded -- the slave CPU is wired up such that a CPU reset will not cause a PCI bus reset to be done. This patch changes arch_reset() so that the slave CPU also executes the reset sequence, allowing it to reboot itself using /sbin/reboot. Signed-off-by:
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Lennert Buytenhek authored
Patch from Lennert Buytenhek The enp2611 version of the ixp2000 netdev driver needs to be able to access a number of on-board peripherals. ioremap() is not suitable for this, as that will cause XCB=000 mappings to be done, which will make the cpu susceptible to crashing on ixp2400 erratum #66. Properly aligned iotable mappings with MT_IXP2000_DEVICE will cause section mappings with XCB=101 to be done, which is safe. Signed-off-by:
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- 31 Oct, 2005 37 commits
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Russell King authored
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Russell King authored
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Catalin Marinas authored
Support for RealView EB. Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
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Paul Mackerras authored
... namely, the change to the 2-argument pte_alloc_kernel. Signed-off-by:Paul Mackerras <paulus@samba.org>
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Paul Mackerras authored
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Paul Mackerras authored
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Paul Mackerras authored
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Paul Mackerras authored
We had a static memory_limit in prom.c, and then another one defined in setup_64.c and used in numa.c, which resulted in the kernel crashing when mem=xxx was given on the command line. This puts the declaration in system.h and the definition in mem.c. This also moves the definition of tce_alloc_start/end out of setup_64.c. Signed-off-by: -
Linus Torvalds authored
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Linus Torvalds authored
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Linus Torvalds authored
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Pekka Enberg authored
This patch removes duplicate directory scanning code from fs/fat/dir.c. The two functions that share identical code are fat_readdirx() and fat_search_long(). This patch also renames fat_readdirx to __fat_readdir(). Signed-off-by:
Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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OGAWA Hirofumi authored
Now, vfat_rename() is using vfat_find() for sanity check. This removes that sanity check, the cost of sanity check is too high. Signed-off-by:
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OGAWA Hirofumi authored
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Tim Schmielau authored
I recently picked up my older work to remove unnecessary #includes of sched.h, starting from a patch by Dave Jones to not include sched.h from module.h. This reduces the number of indirect includes of sched.h by ~300. Another ~400 pointless direct includes can be removed after this disentangling (patch to follow later). However, quite a few indirect includes need to be fixed up for this. In order to feed the patches through -mm with as little disturbance as possible, I've split out the fixes I accumulated up to now (complete for i386 and x86_64, more archs to follow later) and post them before the real patch. This way this large part of the patch is kept simple with only adding #includes, and all hunks are independent of each other. So if any hunk rejects or gets in the way of other patches, just drop it. My scripts will pick it up again in the next round. Signed-off-by:
Tim Schmielau <tim@physik3.uni-rostock.de> Signed-off-by:
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Paul E. McKenney authored
Combine a bit of redundant code between force_sig_info() and force_sig_specific(). Signed-off-by: paulmck@us.ibm.com Signed-off-by:
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Oleg Nesterov authored
This patch removes checks for ->si_code == SI_TIMER from send_signal, specific_send_sig_info, __group_send_sig_info. I think posix-timers.c used these functions some time ago, now it sends signals via send_{,group_}sigqueue, so these hooks are unneeded. Signed-off-by:Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by:
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Oleg Nesterov authored
This patch simplifies some checks for magic siginfo values. It should not change the behaviour in any way. Signed-off-by:
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Oleg Nesterov authored
This patch replaces hardcoded SEND_SIG_xxx constants with their symbolic names. No changes in affected .o files. Signed-off-by:
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Randy Dunlap authored
- Use kzalloc() instead of kmalloc + memset. - Clean/fix some printk's. - Use NULL for pointers instead of 0. - Combine hpet busy searching locations into a function call. Signed-off-by:
Randy Dunlap <randy_d_dunlap@linux.intel.com> Signed-off-by:
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Randy Dunlap authored
- Use HPET physical address to detect duplicates, not logical addresses. Using logical (mapped) addresses fails to detect duplicates because ioremap() returns a new mapped address each time. - iounmap() regions when duplicate/busy areas are found. Signed-off-by:
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Randy Dunlap authored
Allow the ACPI HPET description table to use a resource type of FIXED_MEM32 for the HPET reource. Use the fixed resoure size of 1 KB for the HPET resource as per the HPET spec. Signed-off-by:
Bob Picco <bob.picco@hp.com> Signed-off-by:
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Clemens Ladisch authored
When booting, display the timer frequency in Hertz instead of as tick length in nanoseconds. Apart from saving a local variable, this makes the message more easily comprehensible. Signed-off-by:
Clemens Ladisch <clemens@ladisch.de> Cc: Bob Picco <bob.picco@hp.com> Signed-off-by:
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Clemens Ladisch authored
In the hpet_ioctl_common() function, devp->hd_hpets is already cached in the hpetp variable, so we can use just that. Signed-off-by:
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Clemens Ladisch authored
Fix two instances where a function would access the first HPET device instead of the current one. Signed-off-by:
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Clemens Ladisch authored
Clear the ht_opaque field in the hpet_register() function before searching for a free timer to prevent the function from incorrectly assuming that the search succeeded afterwards. Signed-off-by:
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Clemens Ladisch authored
Fix a division by zero that happened when the HPET_INFO ioctl was called before a timer frequency had been set. Signed-off-by:
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Clemens Ladisch authored
Fix a wrong memory access in hpet_ioctl_common(). It was not possible to use the HPET_INFO ioctl from kernel space because it always called copy_to_user(). Signed-off-by:
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Clemens Ladisch authored
Reads from an HPET register require a round trip to the south bridge and are almost as slow as PCI reads. By caching the last value we've written to the comparator register, we can eliminate all HPET reads from the fast path in the emulated RTC interrupt handler. Signed-off-by:
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by:
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Clemens Ladisch authored
Make sure that the RTC timer is in non-periodic mode; some stupid BIOS might have initialized it to periodic mode. Furthermore, don't set the SETVAL bit in the config register. This wouldn't have any effect unless the timer was in period mode (which it isn't), and then the actual timer frequency would be half that of the desired one because incrementing the comparator in the interrupt handler would be done after the hardware has already incremented it itself. Signed-off-by:
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Clemens Ladisch authored
When the emulated RTC interrupt is no longer needed, we better disable it; otherwise, we get a spurious interrupt whenever the timer has rolled over and reaches the same comparator value. Having a superfluous interrupt every five minutes doesn't hurt much, but it's bad style anyway. ;-) Signed-off-by:
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Clemens Ladisch authored
This patch adds support for shared HPET interrupts. The driver previously acknowledged interrupts for both edge and level interrupts, but didn't actually allow a shared interrupt in the latter case. We use a new per-timer flag to save whether the timer's interrupt might be shared, and use it to do the processing required for level interrupts only if necessary. Signed-off-by:
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Clemens Ladisch authored
It was only the RTC hardware that restricted interrupt frequencies to a power of two. There is no reason to take over this restriction into the HPET driver, so remove the offending check. Signed-off-by:
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Clemens Ladisch authored
This patch removes several reads of a timer's config register that serve no purpose whatsoever. Signed-off-by:
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Clemens Ladisch authored
The variable hpet_ntimer is never read, so remove it. Signed-off-by:
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Clemens Ladisch authored
On 32-bit architectures, the multiplication in the argument for hpet_time_div() often overflows. In the typical case of a 14.32 MHz timer, this happens when the desired frequency exceeds 61 Hz. To avoid this multiplication, we can precompute and store the hardware timer frequency, instead of the period, in the device structure, which leaves us with a simple division when computing the number of timer ticks. As a side effect, this also removes a theoretical bug where the timer interpolator's frequency would be computed as a 32-bit value even if the HPET frequency is greater than 2^32 Hz (the HPET spec allows up to 10 GHz). Signed-off-by:
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Clemens Ladisch authored
Disallow setting an interrupt frequency of zero (which would result in a division by zero), and disallow enabling the interrupt when the frequency hasn't yet been set (which would use an interrupt period of zero). Signed-off-by:
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