s390/vdso: reuse kstrtobool for option value parsing

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"vdso" option setup already recognises integer and textual values. Yet
kstrtobool is a more common way to parse boolean values, reuse it to
unify option value parsing behavior and simplify code a bit.

While at it, __setup value parsing callbacks are expected to return
1 when an option is recognized, and returning any other value won't
trigger any error message currently, so simply return 1.

Also don't change default vdso_enabled value of 1 when "vdso" option
value is invalid.

Reviewed-by: Philipp Rudo <prudo@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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This commit is contained in:

Vasily Gorbik 2019-08-19 17:41:17 +02:00

parent 227f52a43a

commit 3d64436453

1 changed files with 5 additions and 13 deletions

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arch/s390/kernel/vdso.c

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