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| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2019-04-17 15:03:51 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-04-21 15:12:39 +0200 |
| commit | ef629cc5bf0543eb57d6e344ba776880ac35fd00 (patch) | |
| tree | 3713d40f241169a87dae20faae74ee4e744701ca /arch/powerpc/include/asm/book3s/64/mmu-hash.h | |
| parent | powerpc/mm: Reduce memory usage for mm_context_t for radix (diff) | |
| download | linux-ef629cc5bf0543eb57d6e344ba776880ac35fd00.tar.xz linux-ef629cc5bf0543eb57d6e344ba776880ac35fd00.zip | |
powerc/mm/hash: Reduce hash_mm_context size
Allocate subpage protect related variables only if we use the feature.
This helps in reducing the hash related mm context struct by around 4K
Before the patch
sizeof(struct hash_mm_context) = 8288
After the patch
sizeof(struct hash_mm_context) = 4160
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/book3s/64/mmu-hash.h')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/64/mmu-hash.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h index 4481bedbb5be..eeb40091b46b 100644 --- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h +++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h @@ -687,10 +687,8 @@ struct subpage_prot_table { #define SBP_L3_SHIFT (SBP_L2_SHIFT + SBP_L2_BITS) extern void subpage_prot_free(struct mm_struct *mm); -extern void subpage_prot_init_new_context(struct mm_struct *mm); #else static inline void subpage_prot_free(struct mm_struct *mm) {} -static inline void subpage_prot_init_new_context(struct mm_struct *mm) { } #endif /* CONFIG_PPC_SUBPAGE_PROT */ /* @@ -720,7 +718,7 @@ struct hash_mm_context { #endif #ifdef CONFIG_PPC_SUBPAGE_PROT - struct subpage_prot_table spt; + struct subpage_prot_table *spt; #endif /* CONFIG_PPC_SUBPAGE_PROT */ }; |