- 07 Feb, 2008 40 commits
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Jiri Slaby authored
- tty_hangup schedules a bottomhalf itself, tty_wakeup doesn't need it - call the CD code (part of work handler previously) directly from the code (it wakes somebody up or calls tty_hangup at worse) Signed-off-by:
Jiri Slaby <jirislaby@gmail.com> Acked-by:
Alan Cox <alan@redhat.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Jiri Slaby authored
- tqueue is used only for tty_wakeup, call it directly from the code - tqueue_hangup for tty_hangup, it schedules its own work, use it directly too Signed-off-by:
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Jiri Slaby authored
tty_hangup schedules a work for hangup itself, no need to do it in the driver. Signed-off-by:
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Jiri Slaby authored
There is no need to schedule a bottomhalf for either of them. One is fast and the another schedules a bottomhalf itself. Signed-off-by:
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Jiri Slaby authored
Let compiler decide if the rc_init_drivers function will be inlined and mark it as __init, because it's called only from __init function. Signed-off-by:
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Jiri Slaby authored
Don't emit warnings on 64 bit platforms from min(). sizeof() on those is not uint, neither 2 pointers difference, cast it to uint by min_t in both cases. Signed-off-by:
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Jiri Slaby authored
To not pass ulong address as int parameter, switch it to ulong. Signed-off-by:
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Jiri Slaby authored
Signed-off-by:
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Jiri Slaby authored
Signed-off-by:
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Jiri Slaby authored
- add KERN_ level to each print - change some levels appropriately - add \n at the ends where missing - change two complex printks into dev_info, where the original info is printed automatically Signed-off-by:
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Jiri Slaby authored
Don't busy wait for whole 1s when registering some rocket modems. Sleep instead since we are not in atomic. Signed-off-by:
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Frank Sorenson authored
Needs the following in order to work correctly on my Inspiron E1705: Add DMI Product name to i8k for Dell MP061 hardware (Inspiron 9400/E1705) Signed-off-by:
Frank Sorenson <frank@tuxrocks.com> Cc: Bradley Smith <bradjsmith@btinternet.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by:
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Bradley Smith authored
Adds i8k driver to the x86_64 Kconfig. Signed-off-by:
Bradley Smith <bradjsmith@btinternet.com> Cc: Frank Sorenson <frank@tuxrocks.com> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by:
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Bradley Smith authored
Adds #if clause and additional inline assembly so that the driver builds on x86_64 systems. Signed-off-by:
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Mathieu Desnoyers authored
Use the architecture specific __cmpxchg_u32 for 32 bits cmpxchg)_local. Else, use the new generic cmpxchg_local (disables interrupt). Signed-off-by:
Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Chris Zankel <chris@zankel.net> Signed-off-by:
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Mathieu Desnoyers authored
Use the new generic cmpxchg_local (disables interrupt). Also use the generic cmpxchg as fallback if SMP is not set. Signed-off-by:
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Mathieu Desnoyers authored
Use cmpxchg_u32 and cmpxchg_u64 for cmpxchg_local and cmpxchg64_local. For other type sizes, use the new generic cmpxchg_local (disables interrupt). Change: Since the header depends on local_irqsave/local_irqrestore, it must be included after their declaration. Actually, being below the #include <linux/irqflags.h> should be enough, and on sparc64 it is included at the beginning of system.h. So it makes sense to move it up for sparc64. Signed-off-by:
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Mathieu Desnoyers authored
Move cmpxchg and add cmpxchg_local to system.h. Use the new generic cmpxchg_local (disables interrupt). Signed-off-by:
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Mathieu Desnoyers authored
Use the standard __cmpxchg for every type that can be updated atomically. Use the new generic cmpxchg_local (disables interrupt) for other types. Signed-off-by:
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Gunnar Larisch authored
Add a local processor version of cmpxchg for ppc. Implements __cmpxchg_u32_local and uses it for 32 bits cmpxchg_local. It uses the non NMI safe cmpxchg_local_generic for 1, 2 and 8 bytes cmpxchg_local. Signed-off-by:
Gunnar Larisch <gl@denx.de> Signed-off-by:
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Mathieu Desnoyers authored
Use the new generic cmpxchg_local (disables interrupt). Also use the generic cmpxchg as fallback if SMP is not set. Signed-off-by:
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Mathieu Desnoyers authored
Use the new generic cmpxchg_local (disables interrupt). Also use the generic cmpxchg as fallback if SMP is not set. Signed-off-by:
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Mathieu Desnoyers authored
Use the new generic cmpxchg_local (disables interrupt). Also use the generic cmpxchg as fallback if SMP is not set. Signed-off-by:
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Mathieu Desnoyers authored
On m32r, use the new cmpxchg_local as primitive for the local_cmpxchg operation. Signed-off-by:
Hirokazu Takata <takata@linux-m32r.org> Signed-off-by:
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Mathieu Desnoyers authored
This patch is for Mathieu Desnoyers's include/asm-m32r/local.h. Applying the new include/asm-m32r/local.h, inclusion of linux/sched.h is needed to fix a build error of arch/m32r/kernel/smpboot.c. <-- snip --> ... CC arch/m32r/kernel/smpboot.o /project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c: In function 'do_boot_cpu': /project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:279: error: implicit declaration of function 'fork_idle' /project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:279: warning: assignment makes pointer from integer without a cast /project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:283: error: dereferencing pointer to incomplete type /project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:289: error: dereferencing pointer to incomplete type /project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:290: error: implicit declaration of function 'task_thread_info' /project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:290: error: invalid type argument of '->' /project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c: In function 'start_secondary': /project/m32r-linux/kernel/work/linux-2.6_dev.git/arch/m32r/kernel/smpboot.c:429: error: implicit declaration of function 'cpu_init' make[2]: *** [arch/m32r/kernel/smpboot.o] Error 1 <-- snip --> Signed-off-by:
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Mathieu Desnoyers authored
the #endif /* CONFIG_SMP */ should cover the default condition, or it may cause bad parameter to be silently missed. To make it work correctly, we have to remove the ifdef CONFIG SMP surrounding __xchg_called_with_bad_pointer declaration. Thanks to Adrian Bunk for detecting this. Signed-off-by:
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Mathieu Desnoyers authored
Add __xchg_local, xchg_local (define), __cmpxchg_local_u32, __cmpxchg_local, cmpxchg_local(macro). cmpxchg_local and cmpxchg64_local will use the architecture specific __cmpxchg_local_u32 for 32 bits arguments, and use the generic __cmpxchg_local_generic for 8, 16 and 64 bits arguments. Signed-off-by:
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Mathieu Desnoyers authored
Add the primitives cmpxchg_local, cmpxchg64 and cmpxchg64_local to ia64. They use cmpxchg_acq as underlying macro, just like the already existing ia64 cmpxchg(). Changelog: ia64 cmpxchg_local coding style fix Quoting Keith Owens: As a matter of coding style, I prefer #define cmpxchg_local cmpxchg #define cmpxchg64_local cmpxchg64 Which makes it absolutely clear that they are the same code. With your patch, humans have to do a string compare of two defines to see if they are the same. Note cmpxchg is *not* a performance win vs interrupt disable / enable on IA64. Signed-off-by:
Christoph Lameter <clameter@sgi.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Keith Owens <kaos@ocs.com.au> Signed-off-by:
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Mathieu Desnoyers authored
Use the new generic cmpxchg_local (disables interrupt). Also use the generic cmpxchg as fallback if SMP is not set. Signed-off-by:
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Mathieu Desnoyers authored
Use the new generic cmpxchg_local (disables interrupt) for 8, 16 and 64 bits arguments. Use the 32 bits cmpxchg available on the architecture for 32 bits arguments. Signed-off-by:
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Mathieu Desnoyers authored
Use the new generic cmpxchg_local (disables interrupt). Also use the generic cmpxchg as fallback if SMP is not set. Signed-off-by:
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Mathieu Desnoyers authored
Use the new generic cmpxchg_local (disables interrupt). Also use the generic cmpxchg as fallback if SMP is not set since nobody seems to know why __cmpxchg has been implemented in assembly in the first place thather than in plain C. Signed-off-by:
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Mathieu Desnoyers authored
Use the new generic cmpxchg_local (disables interrupt) for 8, 16 and 64 bits cmpxchg_local. Use the __cmpxchg_u32 primitive for 32 bits cmpxchg_local. Note that cmpxchg only uses the __cmpxchg_u32 or __cmpxchg_u64 and will cause a linker error if called with 8 or 16 bits argument. Signed-off-by:
Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by:
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Mathieu Desnoyers authored
Use the new generic cmpxchg_local (disables interrupt). Also use the generic cmpxchg as fallback if SMP is not set. Signed-off-by:
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Mathieu Desnoyers authored
Make sure that at least cmpxchg64_local is available on all architectures to use for unsigned long long values. Signed-off-by:
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Mathieu Desnoyers authored
Make sure that at least cmpxchg64_local is available on all architectures to use for unsigned long long values. Signed-off-by:
Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Mathieu Desnoyers authored
Make sure that at least cmpxchg64_local is available on all architectures to use for unsigned long long values. Signed-off-by:
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Mathieu Desnoyers authored
Make sure that at least cmpxchg64_local is available on all architectures to use for unsigned long long values. Signed-off-by:
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Mathieu Desnoyers authored
Emulates the cmpxchg_local by disabling interrupts around variable modification. This is not reentrant wrt NMIs and MCEs. It is only protected against normal interrupts, but this is enough for architectures without such interrupt sources or if used in a context where the data is not shared with such handlers. It can be used as a fallback for architectures lacking a real cmpxchg instruction. For architectures that have a real cmpxchg but does not have NMIs or MCE, testing which of the generic vs architecture specific cmpxchg is the fastest should be done. asm-generic/cmpxchg.h defines a cmpxchg that uses cmpxchg_local. It is meant to be used as a cmpxchg fallback for architectures that do not support SMP. * Patch series comments Using cmpxchg_local shows a performance improvements of the fast path goes from a 66% speedup on a Pentium 4 to a 14% speedup on AMD64. In detail: Tested-by:
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H. Peter Anvin authored
struct user.u_ar0 is defined to contain a pointer offset on all architectures in which it is defined (all architectures which define an a.out format except SPARC.) However, it has a pointer type in the headers, which is pointless -- <asm/user.h> is not exported to userspace, and it just makes the code messy. Redefine the field as "unsigned long" (which is the same size as a pointer on all Linux architectures) and change the setting code to user offsetof() instead of hand-coded arithmetic. Cc: Linux Arch Mailing List <linux-arch@vger.kernel.org> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Lennert Buytenhek <kernel@wantstofly.org> Cc: Håvard Skinnemoen <hskinnemoen@atmel.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Tony Luck <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by:
H. Peter Anvin <hpa@zytor.com> Signed-off-by:
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