kernel/arch/powerpc/include/asm/nohash/32/pgalloc.h, branch linux-6.2.y

powerpc/mm: refactor pgd_alloc() and pgd_free() on nohash

2019-05-02T15:20:25Z

pgd_alloc() and pgd_free() are identical on nohash 32 and 64. Reviewed-by: Aneesh Kumar K.V Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc/mm: refactor pmd_pgtable()

2019-05-02T15:20:25Z

pmd_pgtable() is identical on the 4 subarches, refactor it. Reviewed-by: Aneesh Kumar K.V Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc/mm: refactor pgtable freeing functions on nohash

2019-05-02T15:20:25Z

pgtable_free() and others are identical on nohash/32 and 64, so move them into asm/nohash/pgalloc.h Reviewed-by: Aneesh Kumar K.V Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc/mm: Only keep one version of pmd_populate() functions on nohash/32

2019-05-02T15:20:25Z

Use IS_ENABLED(CONFIG_BOOKE) to make single versions of pmd_populate() and pmd_populate_kernel() Reviewed-by: Aneesh Kumar K.V Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc/mm: refactor definition of pgtable_cache[]

2019-05-02T15:20:25Z

pgtable_cache[] is the same for the 4 subarches, lets make it common. Reviewed-by: Aneesh Kumar K.V Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc/mm: refactor pte_alloc_one() and pte_free() families definition.

2019-05-02T15:20:25Z

Functions pte_alloc_one(), pte_alloc_one_kernel(), pte_free(), pte_free_kernel() are identical for the four subarches. This patch moves their definition in a common place. Reviewed-by: Aneesh Kumar K.V Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc/mm: inline pte_alloc_one_kernel() and pte_alloc_one() on PPC32

2019-05-02T15:20:25Z

pte_alloc_one_kernel() and pte_alloc_one() are simple calls to pte_fragment_alloc(), so they are good candidates for inlining as already done on PPC64. Reviewed-by: Aneesh Kumar K.V Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc/mm: drop __bad_pte()

2019-05-02T15:20:24Z

This has never been called (since Kernel has been in git at least), drop it. Reviewed-by: Aneesh Kumar K.V Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

mm: treewide: remove unused address argument from pte_alloc functions

2019-01-04T21:13:47Z

Patch series "Add support for fast mremap". This series speeds up the mremap(2) syscall by copying page tables at the PMD level even for non-THP systems. There is concern that the extra 'address' argument that mremap passes to pte_alloc may do something subtle architecture related in the future that may make the scheme not work. Also we find that there is no point in passing the 'address' to pte_alloc since its unused. This patch therefore removes this argument tree-wide resulting in a nice negative diff as well. Also ensuring along the way that the enabled architectures do not do anything funky with the 'address' argument that goes unnoticed by the optimization. Build and boot tested on x86-64. Build tested on arm64. The config enablement patch for arm64 will be posted in the future after more testing. The changes were obtained by applying the following Coccinelle script. (thanks Julia for answering all Coccinelle questions!). Following fix ups were done manually: * Removal of address argument from pte_fragment_alloc * Removal of pte_alloc_one_fast definitions from m68k and microblaze. // Options: --include-headers --no-includes // Note: I split the 'identifier fn' line, so if you are manually // running it, please unsplit it so it runs for you. virtual patch @pte_alloc_func_def depends on patch exists@ identifier E2; identifier fn =~ "^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$"; type T2; @@ fn(... - , T2 E2 ) { ... } @pte_alloc_func_proto_noarg depends on patch exists@ type T1, T2, T3, T4; identifier fn =~ "^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$"; @@ ( - T3 fn(T1, T2); + T3 fn(T1); | - T3 fn(T1, T2, T4); + T3 fn(T1, T2); ) @pte_alloc_func_proto depends on patch exists@ identifier E1, E2, E4; type T1, T2, T3, T4; identifier fn =~ "^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$"; @@ ( - T3 fn(T1 E1, T2 E2); + T3 fn(T1 E1); | - T3 fn(T1 E1, T2 E2, T4 E4); + T3 fn(T1 E1, T2 E2); ) @pte_alloc_func_call depends on patch exists@ expression E2; identifier fn =~ "^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$"; @@ fn(... -, E2 ) @pte_alloc_macro depends on patch exists@ identifier fn =~ "^(__pte_alloc|pte_alloc_one|pte_alloc|__pte_alloc_kernel|pte_alloc_one_kernel)$"; identifier a, b, c; expression e; position p; @@ ( - #define fn(a, b, c) e + #define fn(a, b) e | - #define fn(a, b) e + #define fn(a) e ) Link: http://lkml.kernel.org/r/20181108181201.88826-2-joelaf@google.com Signed-off-by: Joel Fernandes (Google) Suggested-by: Kirill A. Shutemov Acked-by: Kirill A. Shutemov Cc: Michal Hocko Cc: Julia Lawall Cc: Kirill A. Shutemov Cc: William Kucharski Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

powerpc/mm: enable the use of page table cache of order 0

2018-12-04T08:45:01Z

hugepages uses a cache of order 0. Lets allow page tables of order 0 in the common part in order to avoid open coding in hugetlb Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman