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author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-05-15 03:27:39 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-15 05:41:32 +0300 |
commit | 86d0c164272536c732853e19391de5159f860701 (patch) | |
tree | 1c78729a396f6cf429d51d390c1eae600423aa1f /kernel | |
parent | f4d3f25aced3b493e57fd4109e2bc86f0831b23e (diff) | |
download | linux-86d0c164272536c732853e19391de5159f860701.tar.xz |
mm/ioremap: fix iomap_max_page_shift
iomap_max_page_shift is expected to contain a page shift, so it can't be a
'bool', has to be an 'unsigned int'
And fix the default values: P4D_SHIFT is when huge iomap is allowed.
However, on some architectures (eg: powerpc book3s/64), P4D_SHIFT is not a
constant so it can't be used to initialise a static variable. So,
initialise iomap_max_page_shift with a maximum shift supported by the
architecture, it is gated by P4D_SHIFT in vmap_try_huge_p4d() anyway.
Link: https://lkml.kernel.org/r/ad2d366015794a9f21320dcbdd0a8eb98979e9df.1620898113.git.christophe.leroy@csgroup.eu
Fixes: bbc180a5adb0 ("mm: HUGE_VMAP arch support cleanup")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions