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b791d1193a
kernel-ark/arch/mips
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David Daney b791d1193a MIPS: Allow kernel use of LL/SC to be separate from the presence of LL/SC. 
On some CPUs, it is more efficient to disable and enable interrupts in the
kernel rather than use ll/sc for atomic operations.  But if we were to set
cpu_has_llsc to false, we would break the userspace futex interface (in
asm/futex.h).

We separate the two concepts, with a new predicate kernel_uses_llsc, that
lets us disable the kernel's use of ll/sc while still allowing the futex
code to use it.

Also there were a couple of cases in bitops.h where we were using ll/sc
unconditionally even if cpu_has_llsc were false.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-09-17 20:07:50 +02:00
..
alchemy MIPS: MTX-1: Request button GPIO before setting its direction 2009-08-03 17:52:46 +01:00
ar7 MIPS: AR7: Make board code register ar7_wdt as a platform device 2009-09-17 20:07:48 +02:00
basler/excite platform driver: fix incorrect use of 'platform_bus_type' with 'struct device_driver' 2009-03-24 16:38:25 -07:00
bcm47xx
boot
cavium-octeon MIPS: Octeon: Run IPI code with interrupts disabled. 2009-08-03 17:52:47 +01:00
cobalt Update Yoichi Yuasa's e-mail address 2009-07-03 15:45:29 +01:00
configs MIPS: Get rid of CONFIG_CPU_HAS_LLSC 2009-09-17 20:07:50 +02:00
dec MIPS: Eleminate filenames from comments 2009-08-03 17:52:40 +01:00
emma MIPS: Eleminate filenames from comments 2009-08-03 17:52:40 +01:00
fw MIPS: FW: Build with -Werror 2009-09-17 20:07:44 +02:00
gt64120/wrppmc Update Yoichi Yuasa's e-mail address 2009-07-03 15:45:29 +01:00
include/asm MIPS: Allow kernel use of LL/SC to be separate from the presence of LL/SC. 2009-09-17 20:07:50 +02:00
jazz MIPS: Jazz: Fix read buffer overflow 2009-08-03 17:52:47 +01:00
kernel MIPS: Rewrite sysmips(MIPS_ATOMIC_SET, ...) in C with inline assembler 2009-09-17 20:07:49 +02:00
lasat cpumask: remove references to struct irqaction's mask field. 2009-03-30 22:05:14 +10:30
lib MIPS: Fix __ndelay build error and add 'ull' suffix for 32-bit kernel 2009-06-17 11:06:24 +01:00
loongson MIPS: Loongson: Add GCC 4.4 support for Loongson2E 2009-09-17 20:07:47 +02:00
math-emu
mipssim MIPS: MIPSsim: Fix unbalance brace in mipssim get_c0_compare_int() 2009-08-03 17:52:41 +01:00
mm MIPS: Drop mmap_sem in pagefault oom path 2009-08-03 17:52:40 +01:00
mti-malta MIPS: Malta: Convert reset initialization to initcall. 2009-09-17 20:07:43 +02:00
nxp MIPS: Use DIV_ROUND_CLOSEST 2009-08-03 17:52:46 +01:00
oprofile MIPS: Loongson: Add oprofile support 2009-09-17 20:07:47 +02:00
pci MIPS: Loongson: Change naming methods 2009-09-17 20:07:47 +02:00
pmc-sierra MIPS: Simplify and correct interrupt handling for MSP4200 2009-08-03 17:52:43 +01:00
power MIPS: Use PAGE_SIZE in assembly instead of _PAGE_SIZE. 2009-09-17 20:07:48 +02:00
rb532 MIPS: RB532: Check irq number when handling GPIO interrupts 2009-06-17 11:06:27 +01:00
sgi-ip22 MIPS: IP22, IP28: Build with -Werror 2009-09-17 20:07:44 +02:00
sgi-ip27 MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. 2009-06-24 18:34:39 +01:00
sgi-ip32 MIPS: IP32: Remove unnecessary if not even harmful volatile keywords. 2009-05-22 13:52:06 +01:00
sibyte MIPS: Eleminate filenames from comments 2009-08-03 17:52:40 +01:00
sni MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users. 2009-06-24 18:34:39 +01:00
txx9 MIPS: TXx9: Fix error handling. 2009-09-17 20:07:43 +02:00
vr41xx Update Yoichi Yuasa's e-mail address 2009-07-03 15:45:29 +01:00
Kconfig MIPS: Get rid of CONFIG_CPU_HAS_LLSC 2009-09-17 20:07:50 +02:00
Kconfig.debug
Makefile MIPS: Loongson: Add GCC 4.4 support for Loongson2E 2009-09-17 20:07:47 +02:00