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Linux 6.5 compat: replace generic_file_splice_read with filemap_splice_read

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The generic_file_splice_read function was removed in Linux 6.5 in favor
of filemap_splice_read. Add an autoconf test for filemap_splice_read and
use it if it is found as the handler for .splice_read in the
file_operations struct. Additionally, ITER_PIPE was removed in 6.5. This
change removes the ITER_* macros that OpenZFS doesn't use from being
tested in config/kernel-vfs-iov_iter.m4. The removal of ITER_PIPE was
causing the test to fail, which also affected the code responsible for
setting the .splice_read handler, above. That behavior caused run-time
panics on Linux 6.5.

Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Coleman Kane <ckane@colemankane.org>
Closes #15155
This commit is contained in:
Coleman Kane
2023-08-07 18:47:46 -04:00
committed by GitHub
parent fdb8fff916
commit 36261c8238
4 changed files with 32 additions and 2 deletions
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config/kernel.m4
+2
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@@ -161,6 +161,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_SRC], [
ZFS_AC_KERNEL_SRC_WRITEPAGE_T
ZFS_AC_KERNEL_SRC_RECLAIMED
ZFS_AC_KERNEL_SRC_REGISTER_SYSCTL_TABLE
ZFS_AC_KERNEL_SRC_FILEMAP_SPLICE_READ
case "$host_cpu" in
powerpc*)
ZFS_AC_KERNEL_SRC_CPU_HAS_FEATURE
@@ -301,6 +302,7 @@ AC_DEFUN([ZFS_AC_KERNEL_TEST_RESULT], [
ZFS_AC_KERNEL_WRITEPAGE_T
ZFS_AC_KERNEL_RECLAIMED
ZFS_AC_KERNEL_REGISTER_SYSCTL_TABLE
ZFS_AC_KERNEL_FILEMAP_SPLICE_READ
case "$host_cpu" in
powerpc*)
ZFS_AC_KERNEL_CPU_HAS_FEATURE