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42b36cc0ce
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Rusty Russell 42b36cc0ce virtio: Force use of power-of-two for descriptor ring sizes 
The virtio descriptor rings of size N-1 were nicely set up to be
aligned to an N-byte boundary.  But as Anthony Liguori points out, the
free-running indices used by virtio require that the sizes be a power
of 2, otherwise we get problems on wrap (demonstrated with lguest).

So we replace the clever "2^n-1" scheme with a simple "align to page
boundary" scheme: this means that all virtio rings take at least two
pages, but it's safer than guessing cache alignment.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2007-11-12 13:59:40 +11:00
..
acpi ACPI: Fan: Drop force_power_state acpi_device option 2007-10-25 16:31:31 -04:00
asm-alpha Add CONFIG_DEBUG_SG sg validation 2007-10-22 21:20:03 +02:00
asm-arm [ARM] 4644/2: fix flush_kern_tlb_range() in module space 2007-11-08 10:07:14 +00:00
asm-avr32 AVR32: Fix sg_page breakage 2007-10-24 10:16:02 +02:00
asm-blackfin Blackfin arch: use a less common define name in BF549 2007-10-30 12:04:53 +08:00
asm-cris Add CONFIG_DEBUG_SG sg validation 2007-10-22 21:20:03 +02:00
asm-frv frv: Remove bogus NO_IRQ = -1 define 2007-11-09 15:11:44 -08:00
asm-generic Linux Kernel Markers 2007-10-19 11:53:54 -07:00
asm-h8300 Add CONFIG_DEBUG_SG sg validation 2007-10-22 21:20:03 +02:00
asm-ia64 [IA64] Update printing of feature set bits 2007-11-09 13:05:30 -08:00
asm-m32r Add CONFIG_DEBUG_SG sg validation 2007-10-22 21:20:03 +02:00
asm-m68k Add CONFIG_DEBUG_SG sg validation 2007-10-22 21:20:03 +02:00
asm-m68knommu m68knommu: fix pread/pwrite defines 2007-11-05 15:12:33 -08:00
asm-mips Use i8253.c lock for PC speaker on MIPS, too. 2007-11-02 19:39:18 -07:00
asm-parisc parisc: fix sg_page() fallout 2007-10-23 09:49:31 +02:00
asm-powerpc Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2007-11-09 15:16:52 -08:00
asm-ppc ppc: fix AT_VECTOR_SIZE on arch/ppc 2007-10-22 19:18:54 -07:00
asm-s390 Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2007-10-22 19:23:34 -07:00
asm-sh sh: remove dead config symbols from SH code 2007-11-09 04:45:29 +09:00
asm-sh64 sh: remove PTRACE_O_TRACESYSGOOD from asm/ptrace.h 2007-11-07 11:13:54 +09:00
asm-sparc [SPARC32]: __inline__ --> inline 2007-10-27 00:17:01 -07:00
asm-sparc64 [SPARC64]: Use "is_power_of_2" macro for simplicity. 2007-11-07 02:24:33 -08:00
asm-um x86 merge fallout: uml 2007-10-29 07:41:32 -07:00
asm-v850 Add CONFIG_DEBUG_SG sg validation 2007-10-22 21:20:03 +02:00
asm-x86 voyager: use struct instead of PARAM 2007-11-10 04:30:36 +01:00
asm-xtensa xtensa: dma-mapping.h is using linux/scatterlist.h functions, so include it 2007-10-24 13:28:40 +02:00
crypto
keys
linux virtio: Force use of power-of-two for descriptor ring sizes 2007-11-12 13:59:40 +11:00
math-emu
media [PATCH] Fix breakage after SG cleanups 2007-10-23 12:02:39 -07:00
mtd
net [INET]: Remove per bucket rwlock in tcp/dccp ehash table. 2007-11-07 04:15:11 -08:00
pcmcia
rdma cleanup asm/scatterlist.h includes 2007-11-02 08:47:06 +01:00
rxrpc
scsi SCSI: add asynchronous event notification API 2007-11-03 22:23:02 -04:00
sound [ALSA] version 1.0.15 2007-10-23 08:09:20 +02:00
video Make asm-x86/bootparam.h includable from userspace. 2007-10-23 15:49:47 +10:00
xen
Kbuild