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authorNicholas Piggin <npiggin@gmail.com>2021-12-02 00:41:52 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2021-12-09 22:41:13 +1100
commit387e220a2e5e630794e1f5219ed6f11e56271c21 (patch)
tree85b04fbab55f104ba90c3c2e688b83fa5ab613e7 /arch/powerpc/kernel/setup_64.c
parentc28573744b74eb6de19add503d6a986795c4c137 (diff)
powerpc/64s: Move hash MMU support code under CONFIG_PPC_64S_HASH_MMU
Compiling out hash support code when CONFIG_PPC_64S_HASH_MMU=n saves 128kB kernel image size (90kB text) on powernv_defconfig minus KVM, 350kB on pseries_defconfig minus KVM, 40kB on a tiny config. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> [mpe: Fixup defined(ARCH_HAS_MEMREMAP_COMPAT_ALIGN), which needs CONFIG. Fix radix_enabled() use in setup_initial_memory_limit(). Add some stubs to reduce number of ifdefs.] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20211201144153.2456614-18-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kernel/setup_64.c')
-rw-r--r--arch/powerpc/kernel/setup_64.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 9a493796ce66..703a2e6ab08d 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -886,7 +886,7 @@ void __init setup_per_cpu_areas(void)
atom_size = SZ_1M;
} else if (radix_enabled()) {
atom_size = PAGE_SIZE;
- } else {
+ } else if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU)) {
/*
* Linear mapping is one of 4K, 1M and 16M. For 4K, no need
* to group units. For larger mappings, use 1M atom which