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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 13:13:57 +08:00
linux-next/include
Eric W. Biederman a24ceab4f4 [PATCH] genirq: irq: convert the move_irq flag from a 32bit word to a single bit
The primary aim of this patchset is to remove maintenances problems caused by
the irq infrastructure.  The two big issues I address are an artificially
small cap on the number of irqs, and that MSI assumes vector == irq.  My
primary focus is on x86_64 but I have touched other architectures where
necessary to keep them from breaking.

- To increase the number of irqs I modify the code to look at the (cpu,
  vector) pair instead of just looking at the vector.

  With a large number of irqs available systems with a large irq count no
  longer need to compress their irq numbers to fit.  Removing a lot of brittle
  special cases.

  For acpi guys the result is that irq == gsi.

- Addressing the fact that MSI assumes irq == vector takes a few more
  patches.  But suffice it to say when I am done none of the generic irq code
  even knows what a vector is.

In quick testing on a large Unisys x86_64 machine we stumbled over at least
one driver that assumed that NR_IRQS could always fit into an 8 bit number.
This driver is clearly buggy today.  But this has become a class of bugs that
it is now much easier to hit.

This patch:

This is a minor space optimization.  In practice I don't think this has any
affect because of our alignment constraints and the other fields but there is
not point in chewing up an uncessary word and since we already read the flag
field this should improve the cache hit ratio of the irq handler.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rajesh Shah <rajesh.shah@intel.com>
Cc: Andi Kleen <ak@muc.de>
Cc: "Protasevich, Natalie" <Natalie.Protasevich@UNISYS.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-04 07:55:26 -07:00
..
acpi Pull acpi_os_allocate into test branch 2006-07-10 02:39:47 -04:00
asm-alpha [PATCH] rename the provided execve functions to kernel_execve 2006-10-02 07:57:23 -07:00
asm-arm fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-arm26 fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-avr32 [PATCH] AVR32: Implement kernel_execve 2006-10-02 07:57:24 -07:00
asm-cris [PATCH] remove remaining errno and __KERNEL_SYSCALLS__ references 2006-10-02 07:57:23 -07:00
asm-frv fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-generic fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-h8300 [PATCH] remove remaining errno and __KERNEL_SYSCALLS__ references 2006-10-02 07:57:23 -07:00
asm-i386 [PATCH] genirq: convert the i386 architecture to irq-chips 2006-10-04 07:55:25 -07:00
asm-ia64 [PATCH] sched: introduce child field in sched_domain 2006-10-03 08:04:06 -07:00
asm-m32r fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-m68k fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-m68knommu fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-mips Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial 2006-10-03 16:35:11 -07:00
asm-parisc fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-powerpc fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-ppc fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-s390 fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-sh fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-sh64 fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-sparc fix file specification in comments 2006-10-03 23:01:26 +02:00
asm-sparc64 [SPARC64]: Do not include compat.h from asm-sparc64/signal.h any more. 2006-10-02 14:30:45 -07:00
asm-um [PATCH] rename the provided execve functions to kernel_execve 2006-10-02 07:57:23 -07:00
asm-v850 [PATCH] remove remaining errno and __KERNEL_SYSCALLS__ references 2006-10-02 07:57:23 -07:00
asm-x86_64 [PATCH] genirq: convert the x86_64 architecture to irq-chips 2006-10-04 07:55:25 -07:00
asm-xtensa fix file specification in comments 2006-10-03 23:01:26 +02:00
crypto [CRYPTO] digest: Added user API for new hash type 2006-09-21 11:46:17 +10:00
keys [PATCH] keys: discard the contents of a key on revocation 2006-06-26 09:58:18 -07:00
linux [PATCH] genirq: irq: convert the move_irq flag from a 32bit word to a single bit 2006-10-04 07:55:26 -07:00
math-emu
media V4L/DVB (4666): Ensure the WM8775 driver is loaded generically for any board. 2006-10-03 15:13:48 -03:00
mtd Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-10-01 17:55:53 +01:00
net [PATCH] Add genetlink utilities for payload length calculation 2006-10-01 00:39:29 -07:00
pcmcia
rdma IB/sa: fix ib_sa_selector names 2006-09-22 15:22:55 -07:00
rxrpc
scsi [PATCH] scsi: device_reprobe() can fail 2006-09-30 19:33:43 -07:00
sound [PATCH] maximum latency tracking: ALSA support 2006-10-01 00:39:19 -07:00
video fix file specification in comments 2006-10-03 23:01:26 +02:00
Kbuild [HEADERS] One line per header in Kbuild files to reduce conflicts 2006-09-19 12:43:58 +01:00