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authorVladimir Murzin <vladimir.murzin@arm.com>2021-11-30 17:29:54 +0000
committerDennis Zhou <dennis@kernel.org>2021-12-06 12:45:09 -0500
commit3583521aabac76e58675297cead02f9ecac518b6 (patch)
tree8e395593ecc3082a5c4c37416a5c29227e6dbe67 /mm
parent0fcfb00b28c0b7884635dacf38e46d60bf3d4eb1 (diff)
percpu: km: ensure it is used with NOMMU (either UP or SMP)
Currently, NOMMU pull km allocator via !SMP dependency because most of them are UP, yet for SMP+NOMMU vm allocator gets pulled which: * may lead to broken build [1] * ...or not working runtime due to [2] It looks like SMP+NOMMU case was overlooked in bbddff054587 ("percpu: use percpu allocator on UP too") so restore that. [1] For ARM SMP+NOMMU (R-class cores) arm-none-linux-gnueabihf-ld: mm/percpu.o: in function `pcpu_post_unmap_tlb_flush': mm/percpu-vm.c:188: undefined reference to `flush_tlb_kernel_range' [2] static inline int vmap_pages_range_noflush(unsigned long addr, unsigned long end, pgprot_t prot, struct page **pages, unsigned int page_shift) { return -EINVAL; } Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Tested-by: Rob Landley <rob@landley.net> Tested-by: Rich Felker <dalias@libc.org> [Dennis: use depends instead of default for condition] Signed-off-by: Dennis Zhou <dennis@kernel.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/Kconfig2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index 28edafc820ad..356f4f2c779e 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -428,7 +428,7 @@ config THP_SWAP
# UP and nommu archs use km based percpu allocator
#
config NEED_PER_CPU_KM
- depends on !SMP
+ depends on !SMP || !MMU
bool
default y