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Linux 5.16 compat - fpu/xcr.h header and folio_wait_bit() changes #12800

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Linux 5.16 compat - fpu/xcr.h header and folio_wait_bit() changes #12800

wants to merge 2 commits into from

Commits on Nov 26, 2021

  1. Linux 5.16: wait_on_page_bit() no longer available to modules 

    Instead, linux/pagemap.h offers a number of folio-specific functions to
be called instead. In this case, module/os/linux/zfs/zfs_vnops_os.c
wants to call wait_on_page_bit(pp, PG_writeback). This gets replaced
with folio_wait_bit(folio_page(pp), PG_writeback). This change modifies
the code to conditionally compile that if configure identifies th
presence of the folio_wait_bit() function.

Signed-off-by: Coleman Kane <ckane@colemankane.org>
    @ckane
    ckane committed Nov 26, 2021
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  2. Linux 5.16 compat: asm/fpu/xcr.h is new location for xgetbv/xsetbv 

    Linux 5.16 moved these functions into this new header in commit
1b4fb8545f2b00f2844c4b7619d64d98440a477c. This change adds code to look
for the presence of this header, and include it so that the code using
xgetbv & xsetbv will compile again.

Signed-off-by: Coleman Kane <ckane@colemankane.org>
    @ckane
    ckane committed Nov 26, 2021
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