linux/arch
Dwayne Grant McConnell 17f88cebc2 [POWERPC] spufs: Read from signal files only if data is there
We need to check the channel count of the signal notification registers
before reading them, because it can be undefined when the count is
zero. In order to read count and data atomically, we read from the
saved context.

This patch uses spu_acquire_saved() to force a context save before a
/signal1 or /signal2 read. Because of this it is no longer necessary to
have backing_ops and hw_ops versions of this function so they have been
removed.

Regular applications should not rely on reading this register
to be fast, as it's conceptually a write-only file from the PPE
perspective.

Signed-off-by: Dwayne Grant McConnell <decimal@us.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-12-04 20:39:50 +11:00
..
alpha [NET]: Alpha checksum annotations and cleanups. 2006-12-02 21:23:01 -08:00
arm Fix misc Kconfig typos 2006-11-30 05:22:59 +01:00
arm26 [PATCH] remove bogus arch-specific syscall exports 2006-10-11 11:17:07 -07:00
avr32 AVR32: Add missing return instruction in __raw_writesb 2006-11-06 14:07:16 +01:00
cris [NET]: Cris checksum annotations and cleanups. 2006-12-02 21:23:02 -08:00
frv [NET]: FRV checksum annotations. 2006-12-02 21:23:03 -08:00
h8300 [NET]: H8300 checksum annotations and cleanups. 2006-12-02 21:23:04 -08:00
i386 Merge branch 'release' of master.kernel.org:/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6 2006-12-02 08:28:28 -08:00
ia64 [NET]: IA64 checksum annotations and cleanups. 2006-12-02 21:23:05 -08:00
m32r [NET]: M32R checksum annotations and cleanups. 2006-12-02 21:23:06 -08:00
m68k [NET]: M68K checksum annotations and cleanups. 2006-12-02 21:23:07 -08:00
m68knommu [NET]: M68Knommu checksum annotations and cleanups. 2006-12-02 21:23:08 -08:00
mips [NET]: MIPS checksum annotations and cleanups. 2006-12-02 21:23:09 -08:00
parisc [NET]: PARISC checksum annotations and cleanups. 2006-12-02 21:23:10 -08:00
powerpc [POWERPC] spufs: Read from signal files only if data is there 2006-12-04 20:39:50 +11:00
ppc [POWERPC] 8xx: Off-by-one fixes to SCC parameter RAM definitions 2006-12-04 20:39:40 +11:00
s390 [S390] IRQs too early enabled. 2006-11-06 10:49:02 +01:00
sh [NET]: Kill direct includes of asm/checksum.h 2006-12-02 21:22:59 -08:00
sh64 [NET]: SH64 checksum annotations and cleanups. 2006-12-02 21:23:11 -08:00
sparc Fix misc Kconfig typos 2006-11-30 05:22:59 +01:00
sparc64 PCI: Use pci_generic_prep_mwi on sparc64 2006-12-01 14:36:57 -08:00
um [NET]: UML checksum annotations and cleanups. 2006-12-02 21:23:12 -08:00
v850 [NET]: V850 checksum annotations and cleanups. 2006-12-02 21:23:13 -08:00
x86_64 [NET]: X86_64 checksum annotations and cleanups. 2006-12-02 21:23:14 -08:00
xtensa [PATCH] vmlinux.lds: consolidate initcall sections 2006-10-27 15:34:51 -07:00