config: remove HAVE_GENERIC_IO_ACCT_3ARG

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes openzfs#16479

config/kernel-generic_io_acct.m4

@@ -49,18 +49,6 @@ AC_DEFUN([ZFS_AC_KERNEL_SRC_GENERIC_IO_ACCT], [
 		bio_end_io_acct(bio, start_time);
 	])
 
-	ZFS_LINUX_TEST_SRC([generic_acct_3args], [
-		#include <linux/bio.h>
-
-		void (*generic_start_io_acct_f)(int, unsigned long,
-		    struct hd_struct *) = &generic_start_io_acct;
-		void (*generic_end_io_acct_f)(int, struct hd_struct *,
-		    unsigned long) = &generic_end_io_acct;
-	], [
-		generic_start_io_acct(0, 0, NULL);
-		generic_end_io_acct(0, NULL, 0);
-	])
-
 	ZFS_LINUX_TEST_SRC([generic_acct_4args], [
 		#include <linux/bio.h>
 
@@ -138,23 +126,6 @@ AC_DEFUN([ZFS_AC_KERNEL_GENERIC_IO_ACCT], [
 						    [generic_*_io_acct() 4 arg available])
 					], [
 						AC_MSG_RESULT(no)
-
-						dnl #
-						dnl # 3.19 API addition
-						dnl #
-						dnl # torvalds/linux@394ffa50 allows us to increment
-						dnl # iostat counters without generic_make_request().
-						dnl #
-						AC_MSG_CHECKING(
-						    [whether generic_*_io_acct wants 3 args])
-						ZFS_LINUX_TEST_RESULT_SYMBOL([generic_acct_3args],
-						    [generic_start_io_acct], [block/bio.c], [
-							AC_MSG_RESULT(yes)
-							AC_DEFINE(HAVE_GENERIC_IO_ACCT_3ARG, 1,
-							    [generic_*_io_acct() 3 arg available])
-						], [
-							AC_MSG_RESULT(no)
-						])
 					])
 				])
 			])

include/os/linux/kernel/linux/blkdev_compat.h

@@ -466,10 +466,6 @@ blk_generic_start_io_acct(struct request_queue *q __attribute__((unused)),
 	return (disk_start_io_acct(disk, bio_sectors(bio), bio_op(bio)));
 #elif defined(HAVE_BIO_IO_ACCT)
 	return (bio_start_io_acct(bio));
-#elif defined(HAVE_GENERIC_IO_ACCT_3ARG)
-	unsigned long start_time = jiffies;
-	generic_start_io_acct(rw, bio_sectors(bio), &disk->part0);
-	return (start_time);
 #elif defined(HAVE_GENERIC_IO_ACCT_4ARG)
 	unsigned long start_time = jiffies;
 	generic_start_io_acct(q, rw, bio_sectors(bio), &disk->part0);
@@ -494,8 +490,6 @@ blk_generic_end_io_acct(struct request_queue *q __attribute__((unused)),
 	disk_end_io_acct(disk, bio_op(bio), start_time);
 #elif defined(HAVE_BIO_IO_ACCT)
 	bio_end_io_acct(bio, start_time);
-#elif defined(HAVE_GENERIC_IO_ACCT_3ARG)
-	generic_end_io_acct(rw, &disk->part0, start_time);
 #elif defined(HAVE_GENERIC_IO_ACCT_4ARG)
 	generic_end_io_acct(q, rw, &disk->part0, start_time);
 #endif