tty: serial: men_z135_uart: replace __get_free_page() with kmalloc()

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men_z135_probe() allocates a receive staging buffer filled by the
CPU via memcpy_fromio() from the device MMIO region.

This buffer can be allocated with kmalloc() as there's nothing special
about it to go directly to the page allocator.

kmalloc() provides a better API that does not require ugly casts and
kfree() does not need to know the size of the freed object.

Replace use of __get_free_page() with kmalloc() and free_page() with
kfree().

Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Link: https://patch.msgid.link/20260528-b4-tty-v1-3-9da9f7aec5f2@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Mike Rapoport (Microsoft) 2026-05-28 13:24:19 +03:00 • committed by Greg Kroah-Hartman

parent d26ed502d0

commit 274afb49ee

1 changed files with 4 additions and 3 deletions

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drivers/tty/serial/men_z135_uart.c

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