Alan Cox wrote:
linux-2.6.14-rc2-mm1/include/asm-x86_64/atomic.h
--- linux.vanilla-2.6.14-rc2-mm1/include/asm-x86_64/atomic.h 2005-09-22 15:22:11.000000000 +0100
+++ linux-2.6.14-rc2-mm1/include/asm-x86_64/atomic.h 2005-10-14 18:29:47.000000000 +0100
@@ -378,4 +378,16 @@
#define smp_mb__before_atomic_inc() barrier()
#define smp_mb__after_atomic_inc() barrier()
+/* ECC atomic, DMA, SMP and interrupt safe scrub function */
+
+static __inline__ void atomic_scrub(unsigned long *virt_addr, u32 size)
+{
+ u32 i;
+ for (i = 0; i < size / 4; i++, virt_addr++)
(size+7) / 8? or increment virt_addr by 0.5? :)
+ /* Very carefully read and write to memory atomically
+ * so we are interrupt, DMA and SMP safe.
+ */
+ __asm__ __volatile__("lock; addl $0, %0"::"m"(*virt_addr));
shouldn't that be addq?
+}
+
#endif
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
