swap: Use unique local lock name for swap_lock
From lib/Kconfig.debug on CONFIG_FORCE_WEAK_PER_CPU:
----
s390 and alpha require percpu variables in modules to be
defined weak to work around addressing range issue which
puts the following two restrictions on percpu variable
definitions.
1. percpu symbols must be unique whether static or not
2. percpu variables can't be defined inside a function
To ensure that generic code follows the above rules, this
option forces all percpu variables to be defined as weak.
----
The addition of the local IRQ swap_lock in mm/swap.c broke this config
as the name "swap_lock" is used through out the kernel. Just do a "git
grep swap_lock" to see, and the new swap_lock is a local lock which
defines the swap_lock for per_cpu.
The fix was to rename swap_lock to swapvec_lock which keeps it unique.
Reported-by: Mike Galbraith <bitbucket@online.de>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
1 file changed
