ff4a549a34
Add Linux compatibility header stubs needed to compile extents_status.c: - backing-dev.h: Backing device info stub - dax.h: Direct Access (DAX) stubs - iomap.h: I/O mapping operations and structures - mman.h: Memory mapping flags - mount.h: VFS mount structures - pagevec.h: Page vector batching - pfn_t.h: Page frame number type - posix_acl_xattr.h: POSIX ACL xattr definitions - proc_fs.h: Proc filesystem stub - uio.h: User I/O vector definitions - xattr.h: Extended attributes - trace/events/ext4.h: Trace event stubs Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com> Signed-off-by: Simon Glass <simon.glass@canonical.com>
47 lines
975 B
C
47 lines
975 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* include/linux/pagevec.h
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*
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* In many places it is efficient to batch an operation up against multiple
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* folios. A folio_batch is a container which is used for that.
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*/
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#ifndef _LINUX_PAGEVEC_H
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#define _LINUX_PAGEVEC_H
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#include <linux/types.h>
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/* Minimal stub - pagevec is used for batching page operations */
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#define PAGEVEC_SIZE 16
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struct folio;
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struct folio_batch {
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unsigned char nr;
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unsigned char i;
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bool percpu_pvec_drained;
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struct folio *folios[PAGEVEC_SIZE];
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};
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static inline void folio_batch_init(struct folio_batch *fbatch)
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{
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fbatch->nr = 0;
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fbatch->i = 0;
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fbatch->percpu_pvec_drained = false;
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}
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static inline unsigned int folio_batch_count(struct folio_batch *fbatch)
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{
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return fbatch->nr;
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}
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static inline unsigned int folio_batch_add(struct folio_batch *fbatch,
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struct folio *folio)
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{
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fbatch->folios[fbatch->nr++] = folio;
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return PAGEVEC_SIZE - fbatch->nr;
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}
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#endif /* _LINUX_PAGEVEC_H */
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