Merge tag 'irqchip-urgent-3.19' of git://git.infradead.org/users/jcooper/linux into irq/urgent

irqchip urgent fixes for v3.19 from Jason Cooper
 - mtk-sysirq: Fix error handling
 - hip04: Fix cpu map for 16bit value
 - gic-v3-its: Clear a warning regarding decimal constants
 - omap-intc: Fix legacy DMA regression
 - atmel-aic-common: Retain priority when changing type

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index 30faf797c2c..d4e01b35834 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -179,6 +179,7 @@ struct kernfs_open_file {
 	struct mutex		mutex;
 	int			event;
 	struct list_head	list;
+	char			*prealloc_buf;
 
 	size_t			atomic_write_len;
 	bool			mmapped;
@@ -214,6 +215,13 @@ struct kernfs_ops {
 	 * larger ones are rejected with -E2BIG.
 	 */
 	size_t atomic_write_len;
+	/*
+	 * "prealloc" causes a buffer to be allocated at open for
+	 * all read/write requests.  As ->seq_show uses seq_read()
+	 * which does its own allocation, it is incompatible with
+	 * ->prealloc.  Provide ->read and ->write with ->prealloc.
+	 */
+	bool prealloc;
 	ssize_t (*write)(struct kernfs_open_file *of, char *buf, size_t bytes,
 			 loff_t off);