On Wed, Sep 25, 2024 at 09:06:14PM +0000, Arnd Bergmann wrote: > From: Arnd Bergmann <arnd@xxxxxxxx> > > These two architectures each have their own set of MAP_* flags, like > powerpc, mips and others do. In addition, the msync() flags are also > different, here both define the same flags but in a different order. > Finally, alpha also has a custom MADV_DONTNEED flag for madvise. > > Make the generic MADV_DONTNEED and MS_* definitions conditional on > them already being defined and then include the common header > header from both architectures, to remove the bulk of the contents. > > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Lovely! Look at all that red :) Great work! Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx> > --- > arch/alpha/include/uapi/asm/mman.h | 68 +++----------------------- > arch/parisc/include/uapi/asm/mman.h | 66 +------------------------ > include/uapi/asm-generic/mman-common.h | 5 ++ > 3 files changed, 13 insertions(+), 126 deletions(-) > > diff --git a/arch/alpha/include/uapi/asm/mman.h b/arch/alpha/include/uapi/asm/mman.h > index 1f1c03c047ce..fc8b74aa3f89 100644 > --- a/arch/alpha/include/uapi/asm/mman.h > +++ b/arch/alpha/include/uapi/asm/mman.h > @@ -2,18 +2,6 @@ > #ifndef __ALPHA_MMAN_H__ > #define __ALPHA_MMAN_H__ > > -#define PROT_READ 0x1 /* page can be read */ > -#define PROT_WRITE 0x2 /* page can be written */ > -#define PROT_EXEC 0x4 /* page can be executed */ > -#ifndef PROT_SEM /* different on mips and xtensa */ > -#define PROT_SEM 0x8 /* page may be used for atomic ops */ > -#endif > -/* 0x10 reserved for arch-specific use */ > -/* 0x20 reserved for arch-specific use */ > -#define PROT_NONE 0x0 /* page can not be accessed */ > -#define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ > -#define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ > - > /* 0x01 - 0x03 are defined in linux/mman.h */ > #define MAP_TYPE 0x0f /* Mask for type of mapping (OSF/1 is _wrong_) */ > #define MAP_FIXED 0x100 /* Interpret addr exactly */ > @@ -43,62 +31,18 @@ > #define MCL_ONFAULT 32768 /* lock all pages that are faulted in */ > > /* > - * Flags for mlock > - */ > -#define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ > - > -/* > - * Flags for msync > + * Flags for msync, order is different from all others > */ > #define MS_ASYNC 1 /* sync memory asynchronously */ > #define MS_SYNC 2 /* synchronous memory sync */ > #define MS_INVALIDATE 4 /* invalidate the caches */ > > -#define MADV_NORMAL 0 /* no further special treatment */ > -#define MADV_RANDOM 1 /* expect random page references */ > -#define MADV_SEQUENTIAL 2 /* expect sequential page references */ > -#define MADV_WILLNEED 3 /* will need these pages */ > -#define MADV_DONTNEED 6 /* don't need these pages */ > +/* > + * Flags for madvise, 1 through 3 are normal > + */ > /* originally MADV_SPACEAVAIL 5 */ > +#define MADV_DONTNEED 6 /* don't need these pages */ > > -/* common parameters: try to keep these consistent across architectures */ > -#define MADV_FREE 8 /* free pages only if memory pressure */ > -#define MADV_REMOVE 9 /* remove these pages & resources */ > -#define MADV_DONTFORK 10 /* don't inherit across fork */ > -#define MADV_DOFORK 11 /* do inherit across fork */ > - > -#define MADV_MERGEABLE 12 /* KSM may merge identical pages */ > -#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ > - > -#define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ > -#define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ > - > -#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, > - overrides the coredump filter bits */ > -#define MADV_DODUMP 17 /* Clear the MADV_DONTDUMP flag */ > - > -#define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */ > -#define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */ > - > -#define MADV_COLD 20 /* deactivate these pages */ > -#define MADV_PAGEOUT 21 /* reclaim these pages */ > - > -#define MADV_POPULATE_READ 22 /* populate (prefault) page tables readable */ > -#define MADV_POPULATE_WRITE 23 /* populate (prefault) page tables writable */ > - > -#define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */ > - > -#define MADV_COLLAPSE 25 /* Synchronous hugepage collapse */ > - > -#define MADV_HWPOISON 100 /* poison a page for testing */ > -#define MADV_SOFT_OFFLINE 101 /* soft offline page for testing */ > - > -/* compatibility flags */ > -#define MAP_FILE 0 > - > -#define PKEY_DISABLE_ACCESS 0x1 > -#define PKEY_DISABLE_WRITE 0x2 > -#define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ > - PKEY_DISABLE_WRITE) > +#include <asm-generic/mman-common.h> > > #endif /* __ALPHA_MMAN_H__ */ > diff --git a/arch/parisc/include/uapi/asm/mman.h b/arch/parisc/include/uapi/asm/mman.h > index 1cd5d816d4cf..3732950a5cd8 100644 > --- a/arch/parisc/include/uapi/asm/mman.h > +++ b/arch/parisc/include/uapi/asm/mman.h > @@ -2,19 +2,6 @@ > #ifndef __PARISC_MMAN_H__ > #define __PARISC_MMAN_H__ > > - > -#define PROT_READ 0x1 /* page can be read */ > -#define PROT_WRITE 0x2 /* page can be written */ > -#define PROT_EXEC 0x4 /* page can be executed */ > -#ifndef PROT_SEM /* different on mips and xtensa */ > -#define PROT_SEM 0x8 /* page may be used for atomic ops */ > -#endif > -/* 0x10 reserved for arch-specific use */ > -/* 0x20 reserved for arch-specific use */ > -#define PROT_NONE 0x0 /* page can not be accessed */ > -#define PROT_GROWSDOWN 0x01000000 /* mprotect flag: extend change to start of growsdown vma */ > -#define PROT_GROWSUP 0x02000000 /* mprotect flag: extend change to end of growsup vma */ > - > /* 0x01 - 0x03 are defined in linux/mman.h */ > #define MAP_TYPE 0x2b /* Mask for type of mapping, includes bits 0x08 and 0x20 */ > #define MAP_FIXED 0x04 /* Interpret addr exactly */ > @@ -43,61 +30,12 @@ > #define MCL_ONFAULT 4 /* lock all pages that are faulted in */ > > /* > - * Flags for mlock > - */ > -#define MLOCK_ONFAULT 0x01 /* Lock pages in range after they are faulted in, do not prefault */ > - > -/* > - * Flags for msync > + * Flags for msync, order is different from all others > */ > #define MS_SYNC 1 /* synchronous memory sync */ > #define MS_ASYNC 2 /* sync memory asynchronously */ > #define MS_INVALIDATE 4 /* invalidate the caches */ > > -#define MADV_NORMAL 0 /* no further special treatment */ > -#define MADV_RANDOM 1 /* expect random page references */ > -#define MADV_SEQUENTIAL 2 /* expect sequential page references */ > -#define MADV_WILLNEED 3 /* will need these pages */ > -#define MADV_DONTNEED 4 /* don't need these pages */ > - > -/* common parameters: try to keep these consistent across architectures */ > -#define MADV_FREE 8 /* free pages only if memory pressure */ > -#define MADV_REMOVE 9 /* remove these pages & resources */ > -#define MADV_DONTFORK 10 /* don't inherit across fork */ > -#define MADV_DOFORK 11 /* do inherit across fork */ > - > -#define MADV_MERGEABLE 12 /* KSM may merge identical pages */ > -#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ > - > -#define MADV_HUGEPAGE 14 /* Worth backing with hugepages */ > -#define MADV_NOHUGEPAGE 15 /* Not worth backing with hugepages */ > - > -#define MADV_DONTDUMP 16 /* Explicity exclude from the core dump, > - overrides the coredump filter bits */ > -#define MADV_DODUMP 17 /* Clear the MADV_DONTDUMP flag */ > - > -#define MADV_WIPEONFORK 18 /* Zero memory on fork, child only */ > -#define MADV_KEEPONFORK 19 /* Undo MADV_WIPEONFORK */ > - > -#define MADV_COLD 20 /* deactivate these pages */ > -#define MADV_PAGEOUT 21 /* reclaim these pages */ > - > -#define MADV_POPULATE_READ 22 /* populate (prefault) page tables readable */ > -#define MADV_POPULATE_WRITE 23 /* populate (prefault) page tables writable */ > - > -#define MADV_DONTNEED_LOCKED 24 /* like DONTNEED, but drop locked pages too */ > - > -#define MADV_COLLAPSE 25 /* Synchronous hugepage collapse */ > - > -#define MADV_HWPOISON 100 /* poison a page for testing */ > -#define MADV_SOFT_OFFLINE 101 /* soft offline page for testing */ > - > -/* compatibility flags */ > -#define MAP_FILE 0 > - > -#define PKEY_DISABLE_ACCESS 0x1 > -#define PKEY_DISABLE_WRITE 0x2 > -#define PKEY_ACCESS_MASK (PKEY_DISABLE_ACCESS |\ > - PKEY_DISABLE_WRITE) > +#include <asm-generic/mman-common.h> > > #endif /* __PARISC_MMAN_H__ */ > diff --git a/include/uapi/asm-generic/mman-common.h b/include/uapi/asm-generic/mman-common.h > index 2911dd14ef2a..81a14ed99197 100644 > --- a/include/uapi/asm-generic/mman-common.h > +++ b/include/uapi/asm-generic/mman-common.h > @@ -27,15 +27,20 @@ > /* > * Flags for msync > */ > +#ifndef MS_ASYNC /* different order on alpha and parisc */ > #define MS_ASYNC 1 /* sync memory asynchronously */ > #define MS_INVALIDATE 2 /* invalidate the caches */ > #define MS_SYNC 4 /* synchronous memory sync */ > +#endif > > #define MADV_NORMAL 0 /* no further special treatment */ > #define MADV_RANDOM 1 /* expect random page references */ > #define MADV_SEQUENTIAL 2 /* expect sequential page references */ > #define MADV_WILLNEED 3 /* will need these pages */ > +/* 4 through 6 are different on alpha */ > +#ifndef MADV_DONTNEED > #define MADV_DONTNEED 4 /* don't need these pages */ > +#endif Rather nice to have these differences both de-duplicated and documented here... > > /* common parameters: try to keep these consistent across architectures */ > #define MADV_FREE 8 /* free pages only if memory pressure */ > -- > 2.39.2 >
