The patch titled
Subject: lib/bitmap.c: guard exotic bitmap functions by CONFIG_NUMA
has been added to the -mm tree. Its filename is
lib-bitmapc-guard-exotic-bitmap-functions-by-config_numa.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/lib-bitmapc-guard-exotic-bitmap-functions-by-config_numa.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/lib-bitmapc-guard-exotic-bitmap-functions-by-config_numa.patch
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------------------------------------------------------
From: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Subject: lib/bitmap.c: guard exotic bitmap functions by CONFIG_NUMA
The bitmap_remap, _bitremap, _onto and _fold functions are only used, via
their node_ wrappers, in mm/mempolicy.c, which is only built for
CONFIG_NUMA. The helper bitmap_ord_to_pos used by these functions is
global, but its only external caller is node_random() in lib/nodemask.c,
which is also guarded by CONFIG_NUMA.
For !CONFIG_NUMA:
add/remove: 0/6 grow/shrink: 0/0 up/down: 0/-621 (-621)
Function old new delta
bitmap_pos_to_ord 20 - -20
bitmap_ord_to_pos 70 - -70
bitmap_bitremap 81 - -81
bitmap_fold 113 - -113
bitmap_onto 123 - -123
bitmap_remap 214 - -214
Total: Before=4776, After=4155, chg -13.00%
Link: http://lkml.kernel.org/r/20190329205353.6010-2-linux@xxxxxxxxxxxxxxxxxx
Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Cc: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Cc: Yury Norov <yury.norov@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/bitmap.c | 2 ++
1 file changed, 2 insertions(+)
--- a/lib/bitmap.c~lib-bitmapc-guard-exotic-bitmap-functions-by-config_numa
+++ a/lib/bitmap.c
@@ -649,6 +649,7 @@ int bitmap_parselist_user(const char __u
EXPORT_SYMBOL(bitmap_parselist_user);
+#ifdef CONFIG_NUMA
/**
* bitmap_pos_to_ord - find ordinal of set bit at given position in bitmap
* @buf: pointer to a bitmap
@@ -952,6 +953,7 @@ void bitmap_fold(unsigned long *dst, con
for_each_set_bit(oldbit, orig, nbits)
set_bit(oldbit % sz, dst);
}
+#endif /* CONFIG_NUMA */
/*
* Common code for bitmap_*_region() routines.
_
Patches currently in -mm which might be from linux@xxxxxxxxxxxxxxxxxx are
lib-bitmapc-remove-unused-export_symbols.patch
lib-bitmapc-guard-exotic-bitmap-functions-by-config_numa.patch
