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author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-01-12 23:07:46 +0100 |
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committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-01-12 23:07:46 +0100 |
commit | 0a87a2db485a1456b7427914969c0e8195a1bbda (patch) | |
tree | 8d0186672af22c6ee76118c471881cd66a36502d /arch/blackfin/include/asm | |
parent | drm/i915: Reserve shadow batch VMA analogue to others (diff) | |
parent | drm/i915: remove unused power_well/get_cdclk_freq api (diff) | |
download | linux-dev-0a87a2db485a1456b7427914969c0e8195a1bbda.tar.xz linux-dev-0a87a2db485a1456b7427914969c0e8195a1bbda.zip |
Merge tag 'topic/i915-hda-componentized-2015-01-12' into drm-intel-next-queued
Conflicts:
drivers/gpu/drm/i915/intel_runtime_pm.c
Separate branch so that Takashi can also pull just this refactoring
into sound-next.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'arch/blackfin/include/asm')
-rw-r--r-- | arch/blackfin/include/asm/Kbuild | 1 | ||||
-rw-r--r-- | arch/blackfin/include/asm/barrier.h | 51 | ||||
-rw-r--r-- | arch/blackfin/include/asm/bfin_serial.h | 7 |
3 files changed, 54 insertions, 5 deletions
diff --git a/arch/blackfin/include/asm/Kbuild b/arch/blackfin/include/asm/Kbuild index 46ed6bb9c679..4bd3c3cfc9ab 100644 --- a/arch/blackfin/include/asm/Kbuild +++ b/arch/blackfin/include/asm/Kbuild @@ -10,7 +10,6 @@ generic-y += emergency-restart.h generic-y += errno.h generic-y += fb.h generic-y += futex.h -generic-y += hash.h generic-y += hw_irq.h generic-y += ioctl.h generic-y += ipcbuf.h diff --git a/arch/blackfin/include/asm/barrier.h b/arch/blackfin/include/asm/barrier.h index 420006877998..dfb66fe88b34 100644 --- a/arch/blackfin/include/asm/barrier.h +++ b/arch/blackfin/include/asm/barrier.h @@ -22,6 +22,57 @@ # define mb() do { barrier(); smp_check_barrier(); smp_mark_barrier(); } while (0) # define rmb() do { barrier(); smp_check_barrier(); } while (0) # define wmb() do { barrier(); smp_mark_barrier(); } while (0) +/* + * 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() do { barrier(); smp_check_barrier(); } while (0) #endif diff --git a/arch/blackfin/include/asm/bfin_serial.h b/arch/blackfin/include/asm/bfin_serial.h index 2d90d62edc97..d00d732784b1 100644 --- a/arch/blackfin/include/asm/bfin_serial.h +++ b/arch/blackfin/include/asm/bfin_serial.h @@ -9,8 +9,11 @@ #ifndef __BFIN_ASM_SERIAL_H__ #define __BFIN_ASM_SERIAL_H__ +#include <linux/circ_buf.h> #include <linux/serial_core.h> #include <linux/spinlock.h> +#include <linux/timer.h> +#include <linux/workqueue.h> #include <mach/anomaly.h> #include <mach/bfin_serial.h> @@ -25,10 +28,6 @@ # endif #endif -struct circ_buf; -struct timer_list; -struct work_struct; - struct bfin_serial_port { struct uart_port port; unsigned int old_status; |