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| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2021-11-30 18:29:54 +0100 |
|---|---|---|
| committer | Dennis Zhou <dennis@kernel.org> | 2021-12-06 18:45:09 +0100 |
| commit | 3583521aabac76e58675297cead02f9ecac518b6 (patch) | |
| tree | 8e395593ecc3082a5c4c37416a5c29227e6dbe67 /mm | |
| parent | Linux 5.16-rc4 (diff) | |
| download | linux-3583521aabac76e58675297cead02f9ecac518b6.tar.xz linux-3583521aabac76e58675297cead02f9ecac518b6.zip | |
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/Kconfig | 2 |
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 |