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Commit 71d2bcec authored by Philipp Rudo's avatar Philipp Rudo Committed by Linus Torvalds
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kernel/crash_core: suppress unknown crashkernel parameter warning

When booting with crashkernel= on the kernel command line a warning
similar to

    Kernel command line: ro console=ttyS0 crashkernel=256M
    Unknown kernel command line parameters "crashkernel=256M", will be passed to user space.

is printed.

This comes from crashkernel= being parsed independent from the kernel
parameter handling mechanism.  So the code in init/main.c doesn't know
that crashkernel= is a valid kernel parameter and prints this incorrect
warning.

Suppress the warning by adding a dummy early_param handler for
crashkernel=.

Link: https://lkml.kernel.org/r/20211208133443.6867-1-prudo@redhat.com


Fixes: 86d1919a ("init: print out unknown kernel parameters")
Signed-off-by: default avatarPhilipp Rudo <prudo@redhat.com>
Acked-by: default avatarBaoquan He <bhe@redhat.com>
Cc: Andrew Halaney <ahalaney@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 33863534
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