mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-08 17:18:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
554
include/linux/page-flags.h
Normal file
554
include/linux/page-flags.h
Normal file
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@ -0,0 +1,554 @@
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/*
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* Macros for manipulating and testing page->flags
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*/
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#ifndef PAGE_FLAGS_H
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#define PAGE_FLAGS_H
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#include <linux/types.h>
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#include <linux/bug.h>
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#include <linux/mmdebug.h>
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#ifndef __GENERATING_BOUNDS_H
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#include <linux/mm_types.h>
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#include <generated/bounds.h>
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#endif /* !__GENERATING_BOUNDS_H */
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/*
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* Various page->flags bits:
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*
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* PG_reserved is set for special pages, which can never be swapped out. Some
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* of them might not even exist (eg empty_bad_page)...
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*
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* The PG_private bitflag is set on pagecache pages if they contain filesystem
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* specific data (which is normally at page->private). It can be used by
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* private allocations for its own usage.
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*
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* During initiation of disk I/O, PG_locked is set. This bit is set before I/O
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* and cleared when writeback _starts_ or when read _completes_. PG_writeback
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* is set before writeback starts and cleared when it finishes.
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*
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* PG_locked also pins a page in pagecache, and blocks truncation of the file
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* while it is held.
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*
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* page_waitqueue(page) is a wait queue of all tasks waiting for the page
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* to become unlocked.
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*
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* PG_uptodate tells whether the page's contents is valid. When a read
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* completes, the page becomes uptodate, unless a disk I/O error happened.
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*
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* PG_referenced, PG_reclaim are used for page reclaim for anonymous and
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* file-backed pagecache (see mm/vmscan.c).
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*
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* PG_error is set to indicate that an I/O error occurred on this page.
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*
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* PG_arch_1 is an architecture specific page state bit. The generic code
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* guarantees that this bit is cleared for a page when it first is entered into
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* the page cache.
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*
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* PG_highmem pages are not permanently mapped into the kernel virtual address
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* space, they need to be kmapped separately for doing IO on the pages. The
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* struct page (these bits with information) are always mapped into kernel
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* address space...
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*
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* PG_hwpoison indicates that a page got corrupted in hardware and contains
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* data with incorrect ECC bits that triggered a machine check. Accessing is
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* not safe since it may cause another machine check. Don't touch!
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*/
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/*
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* Don't use the *_dontuse flags. Use the macros. Otherwise you'll break
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* locked- and dirty-page accounting.
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*
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* The page flags field is split into two parts, the main flags area
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* which extends from the low bits upwards, and the fields area which
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* extends from the high bits downwards.
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*
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* | FIELD | ... | FLAGS |
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* N-1 ^ 0
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* (NR_PAGEFLAGS)
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*
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* The fields area is reserved for fields mapping zone, node (for NUMA) and
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* SPARSEMEM section (for variants of SPARSEMEM that require section ids like
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* SPARSEMEM_EXTREME with !SPARSEMEM_VMEMMAP).
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*/
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enum pageflags {
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PG_locked, /* Page is locked. Don't touch. */
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PG_error,
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PG_referenced,
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PG_uptodate,
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PG_dirty,
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PG_lru,
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PG_active,
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PG_slab,
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PG_owner_priv_1, /* Owner use. If pagecache, fs may use*/
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PG_arch_1,
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PG_reserved,
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PG_private, /* If pagecache, has fs-private data */
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PG_private_2, /* If pagecache, has fs aux data */
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PG_writeback, /* Page is under writeback */
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#ifdef CONFIG_PAGEFLAGS_EXTENDED
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PG_head, /* A head page */
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PG_tail, /* A tail page */
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#else
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PG_compound, /* A compound page */
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#endif
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PG_swapcache, /* Swap page: swp_entry_t in private */
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PG_mappedtodisk, /* Has blocks allocated on-disk */
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PG_reclaim, /* To be reclaimed asap */
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PG_swapbacked, /* Page is backed by RAM/swap */
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PG_unevictable, /* Page is "unevictable" */
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#ifdef CONFIG_MMU
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PG_mlocked, /* Page is vma mlocked */
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#endif
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#ifdef CONFIG_ARCH_USES_PG_UNCACHED
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PG_uncached, /* Page has been mapped as uncached */
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#endif
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#ifdef CONFIG_MEMORY_FAILURE
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PG_hwpoison, /* hardware poisoned page. Don't touch */
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#endif
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#ifdef CONFIG_TRANSPARENT_HUGEPAGE
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PG_compound_lock,
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#endif
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__NR_PAGEFLAGS,
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/* Filesystems */
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PG_checked = PG_owner_priv_1,
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/* Two page bits are conscripted by FS-Cache to maintain local caching
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* state. These bits are set on pages belonging to the netfs's inodes
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* when those inodes are being locally cached.
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*/
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PG_fscache = PG_private_2, /* page backed by cache */
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/* XEN */
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PG_pinned = PG_owner_priv_1,
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PG_savepinned = PG_dirty,
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/* SLOB */
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PG_slob_free = PG_private,
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};
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#ifndef __GENERATING_BOUNDS_H
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/*
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* Macros to create function definitions for page flags
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*/
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#define TESTPAGEFLAG(uname, lname) \
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static inline int Page##uname(const struct page *page) \
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{ return test_bit(PG_##lname, &page->flags); }
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#define SETPAGEFLAG(uname, lname) \
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static inline void SetPage##uname(struct page *page) \
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{ set_bit(PG_##lname, &page->flags); }
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#define CLEARPAGEFLAG(uname, lname) \
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static inline void ClearPage##uname(struct page *page) \
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{ clear_bit(PG_##lname, &page->flags); }
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#define __SETPAGEFLAG(uname, lname) \
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static inline void __SetPage##uname(struct page *page) \
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{ __set_bit(PG_##lname, &page->flags); }
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#define __CLEARPAGEFLAG(uname, lname) \
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static inline void __ClearPage##uname(struct page *page) \
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{ __clear_bit(PG_##lname, &page->flags); }
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#define TESTSETFLAG(uname, lname) \
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static inline int TestSetPage##uname(struct page *page) \
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{ return test_and_set_bit(PG_##lname, &page->flags); }
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#define TESTCLEARFLAG(uname, lname) \
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static inline int TestClearPage##uname(struct page *page) \
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{ return test_and_clear_bit(PG_##lname, &page->flags); }
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#define __TESTCLEARFLAG(uname, lname) \
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static inline int __TestClearPage##uname(struct page *page) \
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{ return __test_and_clear_bit(PG_##lname, &page->flags); }
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#define PAGEFLAG(uname, lname) TESTPAGEFLAG(uname, lname) \
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SETPAGEFLAG(uname, lname) CLEARPAGEFLAG(uname, lname)
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#define __PAGEFLAG(uname, lname) TESTPAGEFLAG(uname, lname) \
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__SETPAGEFLAG(uname, lname) __CLEARPAGEFLAG(uname, lname)
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#define TESTSCFLAG(uname, lname) \
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TESTSETFLAG(uname, lname) TESTCLEARFLAG(uname, lname)
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#define TESTPAGEFLAG_FALSE(uname) \
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static inline int Page##uname(const struct page *page) { return 0; }
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#define SETPAGEFLAG_NOOP(uname) \
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static inline void SetPage##uname(struct page *page) { }
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#define CLEARPAGEFLAG_NOOP(uname) \
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static inline void ClearPage##uname(struct page *page) { }
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#define __CLEARPAGEFLAG_NOOP(uname) \
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static inline void __ClearPage##uname(struct page *page) { }
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#define TESTSETFLAG_FALSE(uname) \
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static inline int TestSetPage##uname(struct page *page) { return 0; }
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#define TESTCLEARFLAG_FALSE(uname) \
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static inline int TestClearPage##uname(struct page *page) { return 0; }
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#define __TESTCLEARFLAG_FALSE(uname) \
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static inline int __TestClearPage##uname(struct page *page) { return 0; }
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#define PAGEFLAG_FALSE(uname) TESTPAGEFLAG_FALSE(uname) \
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SETPAGEFLAG_NOOP(uname) CLEARPAGEFLAG_NOOP(uname)
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#define TESTSCFLAG_FALSE(uname) \
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TESTSETFLAG_FALSE(uname) TESTCLEARFLAG_FALSE(uname)
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struct page; /* forward declaration */
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TESTPAGEFLAG(Locked, locked)
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PAGEFLAG(Error, error) TESTCLEARFLAG(Error, error)
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PAGEFLAG(Referenced, referenced) TESTCLEARFLAG(Referenced, referenced)
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__SETPAGEFLAG(Referenced, referenced)
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PAGEFLAG(Dirty, dirty) TESTSCFLAG(Dirty, dirty) __CLEARPAGEFLAG(Dirty, dirty)
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PAGEFLAG(LRU, lru) __CLEARPAGEFLAG(LRU, lru)
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PAGEFLAG(Active, active) __CLEARPAGEFLAG(Active, active)
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TESTCLEARFLAG(Active, active)
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__PAGEFLAG(Slab, slab)
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PAGEFLAG(Checked, checked) /* Used by some filesystems */
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PAGEFLAG(Pinned, pinned) TESTSCFLAG(Pinned, pinned) /* Xen */
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PAGEFLAG(SavePinned, savepinned); /* Xen */
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PAGEFLAG(Reserved, reserved) __CLEARPAGEFLAG(Reserved, reserved)
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PAGEFLAG(SwapBacked, swapbacked) __CLEARPAGEFLAG(SwapBacked, swapbacked)
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__SETPAGEFLAG(SwapBacked, swapbacked)
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__PAGEFLAG(SlobFree, slob_free)
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/*
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* Private page markings that may be used by the filesystem that owns the page
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* for its own purposes.
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* - PG_private and PG_private_2 cause releasepage() and co to be invoked
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*/
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PAGEFLAG(Private, private) __SETPAGEFLAG(Private, private)
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__CLEARPAGEFLAG(Private, private)
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PAGEFLAG(Private2, private_2) TESTSCFLAG(Private2, private_2)
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PAGEFLAG(OwnerPriv1, owner_priv_1) TESTCLEARFLAG(OwnerPriv1, owner_priv_1)
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/*
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* Only test-and-set exist for PG_writeback. The unconditional operators are
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* risky: they bypass page accounting.
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*/
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TESTPAGEFLAG(Writeback, writeback) TESTSCFLAG(Writeback, writeback)
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PAGEFLAG(MappedToDisk, mappedtodisk)
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/* PG_readahead is only used for reads; PG_reclaim is only for writes */
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PAGEFLAG(Reclaim, reclaim) TESTCLEARFLAG(Reclaim, reclaim)
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PAGEFLAG(Readahead, reclaim) TESTCLEARFLAG(Readahead, reclaim)
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#ifdef CONFIG_HIGHMEM
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/*
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* Must use a macro here due to header dependency issues. page_zone() is not
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* available at this point.
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*/
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#define PageHighMem(__p) is_highmem(page_zone(__p))
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#else
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PAGEFLAG_FALSE(HighMem)
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#endif
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#ifdef CONFIG_SWAP
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PAGEFLAG(SwapCache, swapcache)
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#else
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PAGEFLAG_FALSE(SwapCache)
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#endif
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PAGEFLAG(Unevictable, unevictable) __CLEARPAGEFLAG(Unevictable, unevictable)
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TESTCLEARFLAG(Unevictable, unevictable)
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#ifdef CONFIG_MMU
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PAGEFLAG(Mlocked, mlocked) __CLEARPAGEFLAG(Mlocked, mlocked)
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TESTSCFLAG(Mlocked, mlocked) __TESTCLEARFLAG(Mlocked, mlocked)
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#else
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PAGEFLAG_FALSE(Mlocked) __CLEARPAGEFLAG_NOOP(Mlocked)
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TESTSCFLAG_FALSE(Mlocked) __TESTCLEARFLAG_FALSE(Mlocked)
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#endif
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#ifdef CONFIG_ARCH_USES_PG_UNCACHED
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PAGEFLAG(Uncached, uncached)
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#else
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PAGEFLAG_FALSE(Uncached)
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#endif
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#ifdef CONFIG_MEMORY_FAILURE
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PAGEFLAG(HWPoison, hwpoison)
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TESTSCFLAG(HWPoison, hwpoison)
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#define __PG_HWPOISON (1UL << PG_hwpoison)
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#else
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PAGEFLAG_FALSE(HWPoison)
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#define __PG_HWPOISON 0
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#endif
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u64 stable_page_flags(struct page *page);
|
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static inline int PageUptodate(struct page *page)
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{
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int ret = test_bit(PG_uptodate, &(page)->flags);
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|
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/*
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* Must ensure that the data we read out of the page is loaded
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* _after_ we've loaded page->flags to check for PageUptodate.
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* We can skip the barrier if the page is not uptodate, because
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* we wouldn't be reading anything from it.
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*
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* See SetPageUptodate() for the other side of the story.
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*/
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if (ret)
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smp_rmb();
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return ret;
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}
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static inline void __SetPageUptodate(struct page *page)
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{
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smp_wmb();
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__set_bit(PG_uptodate, &(page)->flags);
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}
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|
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static inline void SetPageUptodate(struct page *page)
|
||||
{
|
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/*
|
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* Memory barrier must be issued before setting the PG_uptodate bit,
|
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* so that all previous stores issued in order to bring the page
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* uptodate are actually visible before PageUptodate becomes true.
|
||||
*/
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smp_wmb();
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set_bit(PG_uptodate, &(page)->flags);
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}
|
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|
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CLEARPAGEFLAG(Uptodate, uptodate)
|
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|
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extern void cancel_dirty_page(struct page *page, unsigned int account_size);
|
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|
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int test_clear_page_writeback(struct page *page);
|
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int __test_set_page_writeback(struct page *page, bool keep_write);
|
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|
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#define test_set_page_writeback(page) \
|
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__test_set_page_writeback(page, false)
|
||||
#define test_set_page_writeback_keepwrite(page) \
|
||||
__test_set_page_writeback(page, true)
|
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|
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static inline void set_page_writeback(struct page *page)
|
||||
{
|
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test_set_page_writeback(page);
|
||||
}
|
||||
|
||||
static inline void set_page_writeback_keepwrite(struct page *page)
|
||||
{
|
||||
test_set_page_writeback_keepwrite(page);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PAGEFLAGS_EXTENDED
|
||||
/*
|
||||
* System with lots of page flags available. This allows separate
|
||||
* flags for PageHead() and PageTail() checks of compound pages so that bit
|
||||
* tests can be used in performance sensitive paths. PageCompound is
|
||||
* generally not used in hot code paths except arch/powerpc/mm/init_64.c
|
||||
* and arch/powerpc/kvm/book3s_64_vio_hv.c which use it to detect huge pages
|
||||
* and avoid handling those in real mode.
|
||||
*/
|
||||
__PAGEFLAG(Head, head) CLEARPAGEFLAG(Head, head)
|
||||
__PAGEFLAG(Tail, tail)
|
||||
|
||||
static inline int PageCompound(struct page *page)
|
||||
{
|
||||
return page->flags & ((1L << PG_head) | (1L << PG_tail));
|
||||
|
||||
}
|
||||
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
static inline void ClearPageCompound(struct page *page)
|
||||
{
|
||||
BUG_ON(!PageHead(page));
|
||||
ClearPageHead(page);
|
||||
}
|
||||
#endif
|
||||
|
||||
#define PG_head_mask ((1L << PG_head))
|
||||
|
||||
#else
|
||||
/*
|
||||
* Reduce page flag use as much as possible by overlapping
|
||||
* compound page flags with the flags used for page cache pages. Possible
|
||||
* because PageCompound is always set for compound pages and not for
|
||||
* pages on the LRU and/or pagecache.
|
||||
*/
|
||||
TESTPAGEFLAG(Compound, compound)
|
||||
__SETPAGEFLAG(Head, compound) __CLEARPAGEFLAG(Head, compound)
|
||||
|
||||
/*
|
||||
* PG_reclaim is used in combination with PG_compound to mark the
|
||||
* head and tail of a compound page. This saves one page flag
|
||||
* but makes it impossible to use compound pages for the page cache.
|
||||
* The PG_reclaim bit would have to be used for reclaim or readahead
|
||||
* if compound pages enter the page cache.
|
||||
*
|
||||
* PG_compound & PG_reclaim => Tail page
|
||||
* PG_compound & ~PG_reclaim => Head page
|
||||
*/
|
||||
#define PG_head_mask ((1L << PG_compound))
|
||||
#define PG_head_tail_mask ((1L << PG_compound) | (1L << PG_reclaim))
|
||||
|
||||
static inline int PageHead(struct page *page)
|
||||
{
|
||||
return ((page->flags & PG_head_tail_mask) == PG_head_mask);
|
||||
}
|
||||
|
||||
static inline int PageTail(struct page *page)
|
||||
{
|
||||
return ((page->flags & PG_head_tail_mask) == PG_head_tail_mask);
|
||||
}
|
||||
|
||||
static inline void __SetPageTail(struct page *page)
|
||||
{
|
||||
page->flags |= PG_head_tail_mask;
|
||||
}
|
||||
|
||||
static inline void __ClearPageTail(struct page *page)
|
||||
{
|
||||
page->flags &= ~PG_head_tail_mask;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
static inline void ClearPageCompound(struct page *page)
|
||||
{
|
||||
BUG_ON((page->flags & PG_head_tail_mask) != (1 << PG_compound));
|
||||
clear_bit(PG_compound, &page->flags);
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* !PAGEFLAGS_EXTENDED */
|
||||
|
||||
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
/*
|
||||
* PageHuge() only returns true for hugetlbfs pages, but not for
|
||||
* normal or transparent huge pages.
|
||||
*
|
||||
* PageTransHuge() returns true for both transparent huge and
|
||||
* hugetlbfs pages, but not normal pages. PageTransHuge() can only be
|
||||
* called only in the core VM paths where hugetlbfs pages can't exist.
|
||||
*/
|
||||
static inline int PageTransHuge(struct page *page)
|
||||
{
|
||||
VM_BUG_ON_PAGE(PageTail(page), page);
|
||||
return PageHead(page);
|
||||
}
|
||||
|
||||
/*
|
||||
* PageTransCompound returns true for both transparent huge pages
|
||||
* and hugetlbfs pages, so it should only be called when it's known
|
||||
* that hugetlbfs pages aren't involved.
|
||||
*/
|
||||
static inline int PageTransCompound(struct page *page)
|
||||
{
|
||||
return PageCompound(page);
|
||||
}
|
||||
|
||||
/*
|
||||
* PageTransTail returns true for both transparent huge pages
|
||||
* and hugetlbfs pages, so it should only be called when it's known
|
||||
* that hugetlbfs pages aren't involved.
|
||||
*/
|
||||
static inline int PageTransTail(struct page *page)
|
||||
{
|
||||
return PageTail(page);
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
static inline int PageTransHuge(struct page *page)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int PageTransCompound(struct page *page)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static inline int PageTransTail(struct page *page)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* If network-based swap is enabled, sl*b must keep track of whether pages
|
||||
* were allocated from pfmemalloc reserves.
|
||||
*/
|
||||
static inline int PageSlabPfmemalloc(struct page *page)
|
||||
{
|
||||
VM_BUG_ON_PAGE(!PageSlab(page), page);
|
||||
return PageActive(page);
|
||||
}
|
||||
|
||||
static inline void SetPageSlabPfmemalloc(struct page *page)
|
||||
{
|
||||
VM_BUG_ON_PAGE(!PageSlab(page), page);
|
||||
SetPageActive(page);
|
||||
}
|
||||
|
||||
static inline void __ClearPageSlabPfmemalloc(struct page *page)
|
||||
{
|
||||
VM_BUG_ON_PAGE(!PageSlab(page), page);
|
||||
__ClearPageActive(page);
|
||||
}
|
||||
|
||||
static inline void ClearPageSlabPfmemalloc(struct page *page)
|
||||
{
|
||||
VM_BUG_ON_PAGE(!PageSlab(page), page);
|
||||
ClearPageActive(page);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_MMU
|
||||
#define __PG_MLOCKED (1 << PG_mlocked)
|
||||
#else
|
||||
#define __PG_MLOCKED 0
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
||||
#define __PG_COMPOUND_LOCK (1 << PG_compound_lock)
|
||||
#else
|
||||
#define __PG_COMPOUND_LOCK 0
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Flags checked when a page is freed. Pages being freed should not have
|
||||
* these flags set. It they are, there is a problem.
|
||||
*/
|
||||
#define PAGE_FLAGS_CHECK_AT_FREE \
|
||||
(1 << PG_lru | 1 << PG_locked | \
|
||||
1 << PG_private | 1 << PG_private_2 | \
|
||||
1 << PG_writeback | 1 << PG_reserved | \
|
||||
1 << PG_slab | 1 << PG_swapcache | 1 << PG_active | \
|
||||
1 << PG_unevictable | __PG_MLOCKED | __PG_HWPOISON | \
|
||||
__PG_COMPOUND_LOCK)
|
||||
|
||||
/*
|
||||
* Flags checked when a page is prepped for return by the page allocator.
|
||||
* Pages being prepped should not have any flags set. It they are set,
|
||||
* there has been a kernel bug or struct page corruption.
|
||||
*/
|
||||
#define PAGE_FLAGS_CHECK_AT_PREP ((1 << NR_PAGEFLAGS) - 1)
|
||||
|
||||
#define PAGE_FLAGS_PRIVATE \
|
||||
(1 << PG_private | 1 << PG_private_2)
|
||||
/**
|
||||
* page_has_private - Determine if page has private stuff
|
||||
* @page: The page to be checked
|
||||
*
|
||||
* Determine if a page has private stuff, indicating that release routines
|
||||
* should be invoked upon it.
|
||||
*/
|
||||
static inline int page_has_private(struct page *page)
|
||||
{
|
||||
return !!(page->flags & PAGE_FLAGS_PRIVATE);
|
||||
}
|
||||
|
||||
#endif /* !__GENERATING_BOUNDS_H */
|
||||
|
||||
#endif /* PAGE_FLAGS_H */
|
||||
Loading…
Add table
Add a link
Reference in a new issue