diff options
Diffstat (limited to 'arch/alpha')
-rw-r--r-- | arch/alpha/include/asm/Kbuild | 1 | ||||
-rw-r--r-- | arch/alpha/include/asm/barrier.h | 51 | ||||
-rw-r--r-- | arch/alpha/include/uapi/asm/socket.h | 5 | ||||
-rw-r--r-- | arch/alpha/kernel/osf_sys.c | 7 |
4 files changed, 60 insertions, 4 deletions
diff --git a/arch/alpha/include/asm/Kbuild b/arch/alpha/include/asm/Kbuild index 25b49725df07..76aeb8fa551a 100644 --- a/arch/alpha/include/asm/Kbuild +++ b/arch/alpha/include/asm/Kbuild @@ -3,7 +3,6 @@ generic-y += clkdev.h generic-y += cputime.h generic-y += exec.h -generic-y += hash.h generic-y += irq_work.h generic-y += mcs_spinlock.h generic-y += preempt.h diff --git a/arch/alpha/include/asm/barrier.h b/arch/alpha/include/asm/barrier.h index 3832bdb794fe..77516c87255d 100644 --- a/arch/alpha/include/asm/barrier.h +++ b/arch/alpha/include/asm/barrier.h @@ -7,6 +7,57 @@ #define rmb() __asm__ __volatile__("mb": : :"memory") #define wmb() __asm__ __volatile__("wmb": : :"memory") +/** + * read_barrier_depends - Flush all pending reads that subsequents reads + * depend on. + * + * No data-dependent reads from memory-like regions are ever reordered + * over this barrier. All reads preceding this primitive are guaranteed + * to access memory (but not necessarily other CPUs' caches) before any + * reads following this primitive that depend on the data return by + * any of the preceding reads. This primitive is much lighter weight than + * rmb() on most CPUs, and is never heavier weight than is + * rmb(). + * + * These ordering constraints are respected by both the local CPU + * and the compiler. + * + * Ordering is not guaranteed by anything other than these primitives, + * not even by data dependencies. See the documentation for + * memory_barrier() for examples and URLs to more information. + * + * For example, the following code would force ordering (the initial + * value of "a" is zero, "b" is one, and "p" is "&a"): + * + * <programlisting> + * CPU 0 CPU 1 + * + * b = 2; + * memory_barrier(); + * p = &b; q = p; + * read_barrier_depends(); + * d = *q; + * </programlisting> + * + * because the read of "*q" depends on the read of "p" and these + * two reads are separated by a read_barrier_depends(). However, + * the following code, with the same initial values for "a" and "b": + * + * <programlisting> + * CPU 0 CPU 1 + * + * a = 2; + * memory_barrier(); + * b = 3; y = b; + * read_barrier_depends(); + * x = a; + * </programlisting> + * + * does not enforce ordering, since there is no data dependency between + * the read of "a" and the read of "b". Therefore, on some CPUs, such + * as Alpha, "y" could be set to 3 and "x" to 0. Use rmb() + * in cases like this where there are no data dependencies. + */ #define read_barrier_depends() __asm__ __volatile__("mb": : :"memory") #ifdef CONFIG_SMP diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h index 3de1394bcab8..9a20821b111c 100644 --- a/arch/alpha/include/uapi/asm/socket.h +++ b/arch/alpha/include/uapi/asm/socket.h @@ -87,4 +87,9 @@ #define SO_BPF_EXTENSIONS 48 +#define SO_INCOMING_CPU 49 + +#define SO_ATTACH_BPF 50 +#define SO_DETACH_BPF SO_DETACH_FILTER + #endif /* _UAPI_ASM_SOCKET_H */ diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c index f9c732e18284..e51f578636a5 100644 --- a/arch/alpha/kernel/osf_sys.c +++ b/arch/alpha/kernel/osf_sys.c @@ -104,11 +104,12 @@ struct osf_dirent_callback { }; static int -osf_filldir(void *__buf, const char *name, int namlen, loff_t offset, - u64 ino, unsigned int d_type) +osf_filldir(struct dir_context *ctx, const char *name, int namlen, + loff_t offset, u64 ino, unsigned int d_type) { struct osf_dirent __user *dirent; - struct osf_dirent_callback *buf = (struct osf_dirent_callback *) __buf; + struct osf_dirent_callback *buf = + container_of(ctx, struct osf_dirent_callback, ctx); unsigned int reclen = ALIGN(NAME_OFFSET + namlen + 1, sizeof(u32)); unsigned int d_ino; |