Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  Revert "unexport bio_{,un}map_user"
  relay: fix subbuf_splice_actor() adding too many pages
  The ps2esdi driver was marked as BROKEN more than two years ago due to being

Documentation/mca.txt

@@ -143,14 +143,7 @@ MCA Device Drivers
 
 Currently, there are a number of MCA-specific device drivers.
 
-1) PS/2 ESDI
-	drivers/block/ps2esdi.c
-	include/linux/ps2esdi.h
-   Uses major number 36, and should use /dev files /dev/eda, /dev/edb.
-   Supports two drives, but only one controller.  May use the
-   command-line args "ed=cyl,head,sec" and "tp720".
-
-2) PS/2 SCSI
+1) PS/2 SCSI
 	drivers/scsi/ibmmca.c
 	drivers/scsi/ibmmca.h
    The driver for the IBM SCSI subsystem.  Includes both integrated
@@ -159,25 +152,25 @@ Currently, there are a number of MCA-specific device drivers.
    machine with a front-panel display (i.e. model 95), you can use
    "ibmmcascsi=display" to enable a drive activity indicator.
 
-3) 3c523
+2) 3c523
 	drivers/net/3c523.c
 	drivers/net/3c523.h
    3Com 3c523 Etherlink/MC ethernet driver.
 
-4) SMC Ultra/MCA and IBM Adapter/A
+3) SMC Ultra/MCA and IBM Adapter/A
 	drivers/net/smc-mca.c
 	drivers/net/smc-mca.h
 	Driver for the MCA version of the SMC Ultra and various other
 	OEM'ed and work-alike cards (Elite, Adapter/A, etc).
 
-5) NE/2
+4) NE/2
 	driver/net/ne2.c
 	driver/net/ne2.h
 	The NE/2 is the MCA version of the NE2000.  This may not work
 	with clones that have a different adapter id than the original
 	NE/2.
 
-6) Future Domain MCS-600/700, OEM'd IBM Fast SCSI Adapter/A and
+5) Future Domain MCS-600/700, OEM'd IBM Fast SCSI Adapter/A and
    Reply Sound Blaster/SCSI (SCSI part)
 	Better support for these cards than the driver for ISA.
    Supports multiple cards with IRQ sharing.

drivers/block/Kconfig

@@ -44,16 +44,6 @@ config MAC_FLOPPY
 	  If you have a SWIM-3 (Super Woz Integrated Machine 3; from Apple)
 	  floppy controller, say Y here. Most commonly found in PowerMacs.
 
-config BLK_DEV_PS2
-	tristate "PS/2 ESDI hard disk support"
-	depends on MCA && MCA_LEGACY && BROKEN
-	help
-	  Say Y here if you have a PS/2 machine with a MCA bus and an ESDI
-	  hard disk.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called ps2esdi.
-
 config AMIGA_Z2RAM
 	tristate "Amiga Zorro II ramdisk support"
 	depends on ZORRO

drivers/block/Makefile

@@ -13,7 +13,6 @@ obj-$(CONFIG_ATARI_FLOPPY)	+= ataflop.o
 obj-$(CONFIG_AMIGA_Z2RAM)	+= z2ram.o
 obj-$(CONFIG_BLK_DEV_RAM)	+= brd.o
 obj-$(CONFIG_BLK_DEV_LOOP)	+= loop.o
-obj-$(CONFIG_BLK_DEV_PS2)	+= ps2esdi.o
 obj-$(CONFIG_BLK_DEV_XD)	+= xd.o
 obj-$(CONFIG_BLK_CPQ_DA)	+= cpqarray.o
 obj-$(CONFIG_BLK_CPQ_CISS_DA)  += cciss.o

fs/bio.c

@@ -1194,6 +1194,8 @@ EXPORT_SYMBOL(bio_hw_segments);
 EXPORT_SYMBOL(bio_add_page);
 EXPORT_SYMBOL(bio_add_pc_page);
 EXPORT_SYMBOL(bio_get_nr_vecs);
+EXPORT_SYMBOL(bio_map_user);
+EXPORT_SYMBOL(bio_unmap_user);
 EXPORT_SYMBOL(bio_map_kern);
 EXPORT_SYMBOL(bio_pair_release);
 EXPORT_SYMBOL(bio_split);

include/linux/Kbuild

@@ -127,7 +127,6 @@ header-y += pkt_sched.h
 header-y += posix_types.h
 header-y += ppdev.h
 header-y += prctl.h
-header-y += ps2esdi.h
 header-y += qnxtypes.h
 header-y += quotaio_v1.h
 header-y += quotaio_v2.h

include/linux/ps2esdi.h

-#ifndef _PS2ESDI_H_
-#define _PS2ESDI_H_
-
-#define NRML_ESDI_ID 0xddff
-#define INTG_ESDI_ID 0xdf9f
-
-#define PRIMARY_IO_BASE 0x3510
-#define ALT_IO_BASE 0x3518
-
-#define ESDI_CMD_INT (io_base+0)
-#define ESDI_STT_INT (io_base+0)
-#define ESDI_CONTROL (io_base+2)
-#define ESDI_STATUS  (io_base+2)
-#define ESDI_ATTN    (io_base+3)
-#define ESDI_INTRPT  (io_base+3)
-
-#define STATUS_ENABLED    0x01
-#define STATUS_ALTERNATE  0x02
-#define STATUS_BUSY       0x10
-#define STATUS_STAT_AVAIL 0x08
-#define STATUS_INTR       0x01
-#define STATUS_RESET_FAIL 0xea
-#define STATUS_CMD_INF	  0x04
-
-#define CTRL_SOFT_RESET   0xe4
-#define CTRL_HARD_RESET   0x80
-#define CTRL_EOI          0xe2
-#define CTRL_ENABLE_DMA   0x02
-#define CTRL_ENABLE_INTR  0x01
-#define CTRL_DISABLE_INTR  0x00
-
-#define ATT_EOI 0x02
-
-/* bits of word 0 of configuration status block. more info see p.38 of tech ref */
-#define CONFIG_IS 0x10 /* Invalid Secondary */
-#define CONFIG_ZD 0x08 /* Zero Defect */
-#define CONFIG_SF 0x04 /* Skewed Format */
-#define CONFIG_FR 0x02 /* Removable */
-#define CONFIG_RT 0x01 /* Retries */
-
-#define PORT_SYS_A   0x92
-#define PORT_DMA_FN  0x18
-#define PORT_DMA_EX  0x1a
-
-#define ON (unsigned char)0x40
-#define OFF (unsigned char)~ON
-#define LITE_ON outb(inb(PORT_SYS_A) | ON,PORT_SYS_A)
-#define LITE_OFF outb((inb(PORT_SYS_A) & OFF),PORT_SYS_A)
-
-#define FAIL 0
-#define SUCCES 1
-
-#define INT_CMD_COMPLETE 0x01
-#define INT_CMD_ECC      0x03
-#define INT_CMD_RETRY    0x05
-#define INT_CMD_FORMAT   0x06
-#define INT_CMD_ECC_RETRY 0x07
-#define INT_CMD_WARNING  0x08
-#define INT_CMD_ABORT    0x09
-#define INT_RESET        0x0A
-#define INT_TRANSFER_REQ 0x0B
-#define INT_CMD_FAILED   0x0C
-#define INT_DMA_ERR      0x0D
-#define INT_CMD_BLK_ERR  0x0E
-#define INT_ATTN_ERROR   0x0F
-
-#define DMA_MASK_CHAN 0x90
-#define DMA_UNMASK_CHAN 0xA0
-#define DMA_WRITE_ADDR 0x20
-#define DMA_WRITE_TC 0x40
-#define DMA_WRITE_MODE 0x70
-
-#define CMD_GET_DEV_CONFIG 0x09
-#define CMD_READ 0x4601
-#define CMD_WRITE 0x4602
-#define DMA_READ_16 0x4C
-#define DMA_WRITE_16 0x44
-
-
-#define MB 1024*1024
-#define SECT_SIZE 512   
-
-#define ERROR 1
-#define OK 0
-
-#define HDIO_GETGEO 0x0301
-
-#define FALSE 0
-#define TRUE !FALSE
-
-struct ps2esdi_geometry {
-	unsigned char heads;
-	unsigned char sectors;
-	unsigned short cylinders;
-	unsigned long start;
-};
-
-#endif /* _PS2ESDI_H_ */

kernel/relay.c

@@ -1066,7 +1066,7 @@ static int subbuf_splice_actor(struct file *in,
 			       unsigned int flags,
 			       int *nonpad_ret)
 {
-	unsigned int pidx, poff, total_len, subbuf_pages, ret;
+	unsigned int pidx, poff, total_len, subbuf_pages, nr_pages, ret;
 	struct rchan_buf *rbuf = in->private_data;
 	unsigned int subbuf_size = rbuf->chan->subbuf_size;
 	uint64_t pos = (uint64_t) *ppos;
@@ -1097,8 +1097,9 @@ static int subbuf_splice_actor(struct file *in,
 	subbuf_pages = rbuf->chan->alloc_size >> PAGE_SHIFT;
 	pidx = (read_start / PAGE_SIZE) % subbuf_pages;
 	poff = read_start & ~PAGE_MASK;
+	nr_pages = min_t(unsigned int, subbuf_pages, PIPE_BUFFERS);
 
-	for (total_len = 0; spd.nr_pages < subbuf_pages; spd.nr_pages++) {
+	for (total_len = 0; spd.nr_pages < nr_pages; spd.nr_pages++) {
 		unsigned int this_len, this_end, private;
 		unsigned int cur_pos = read_start + total_len;