fix various typos in comments.

fix various small typos, mainly in comments.

Revere modification of initializer; it can lead to race conditions where two
allocation would pick the `empty' space causing a panic later on.

On freeing a virtual address in the VAT, use the correct value; this might
confuse other implementations who can reject the VAT on this.

fix typos in comments, mainly s/extention/extension/ and s/sufficent/sufficient/

fix various typos in comments and log messages.

Fix all remaining typos, mainly in comments but also in few definitions and log messages, reported by me in PR kern/54889.
Also fixed some additional typos in comments, found on review of same files

Fix all remaining typos, mainly in comments but also in few definitions and log messages, reported by me in PR kern/54889.
Also fixed some additional typos in comments, found on review of same files or typos.

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PR kern/54759 (vm.ubc_direct deadlock when read()/write() into mapping of itself)

- Add new flag UBC_ISMAPPED which tells ubc_uiomove() the object is mmap()ed
somewhere. Use it to decide whether

PR kern/54759 (vm.ubc_direct deadlock when read()/write() into mapping of itself)

- Add new flag UBC_ISMAPPED which tells ubc_uiomove() the object is mmap()ed
somewhere. Use it to decide whether to do direct-mapped copy, rather than
poking around directly in the vnode in ubc_uiomove(), which is ugly and
doesn't work for tmpfs. It would be nicer to contain all this in UVM but
the filesystem provides the needed locking here (VV_MAPPED) and to
reinvent that would suck more.

- Rename UBC_UNMAP_FLAG() to UBC_VNODE_FLAGS(). Pass in UBC_ISMAPPED where
appropriate.

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remove M_CANFAIL flag for malloc(9) - it was completely ignored, so had
actually no effect

PR/51777: David Binderman: Remove unused computation

Remove dirtynodes_cv, it is only used for timed waits without any signals.

Replace the cv_timedwait with kpause.

Relax the KASSERT since an equal size is no issue

used __diagused where appropriate.

fix unused variable warnings

Fix 32 bit issue in main file read-in function. On both 32 bit and 64 bit
hosts a missing cast would result in `garbage' after the 4Gbyte limit.

On growing a node that was recorded inside the (E)FE, don't forget to set the
size of the node to the NEW size. This was reported by the `t_io
udf_shrinkfile' testcase.

Fixes PR kern/47985

Rename uvm_vnp_zerorange(struct vnode *, off_t, size_t) to
ubc_zerorange(struct uvm_object *, off_t, size_t, int) changing
the first argument to an uvm_object and adding a flags argument.

Modify tmp

Rename uvm_vnp_zerorange(struct vnode *, off_t, size_t) to
ubc_zerorange(struct uvm_object *, off_t, size_t, int) changing
the first argument to an uvm_object and adding a flags argument.

Modify tmpfs_reg_resize() to zero the backing store (aobj) instead
of the vnode. Ubc_purge() no longer panics when unmounting tmpfs.

Keep uvm_vnp_zerorange() until the next kernel version bump.

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Metadata partition (v2.50+) bugfix commit :

* fix copying of the extents of the metadata node to the metadatamirror node;
it was not copying all extents.

* fix truncing metadata partition:
* f

Metadata partition (v2.50+) bugfix commit :

* fix copying of the extents of the metadata node to the metadatamirror node;
it was not copying all extents.

* fix truncing metadata partition:
* fix endian conversions
* fix information length calculation so its truncated to the right length!

* allow for setting maximum extent length in extent merging. This is needed
since extents in the metadata partition files are only to be in allocation
unit sizes.

* adjust grow and shrink node to set the granularity of the maximum length of
an extent when encountering a metadatafile or metadatamirror file.

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Growing the metadata partition is not yet implemented. Be so kind to report
this as unimplemented when the debug flag asks for it!

Typo and style

First part of shrinking/growing metadata partition support:

- extending the metadata partition

Still to follow:
- sparsify metadata partition
- growing the metadata partition
- unsparsifying metada

First part of shrinking/growing metadata partition support:

- extending the metadata partition

Still to follow:
- sparsify metadata partition
- growing the metadata partition
- unsparsifying metadata partition

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Fix corner-case in truncing files. It could forget to free the last block.
This would result in a free-space map with one block orphaned.

Commit first stage of free-space accounting. It is estimating the underlimit
of free blocks on the device and when free blocks are getting tight it tries
to readjust/recalculate that value by syncing

Commit first stage of free-space accounting. It is estimating the underlimit
of free blocks on the device and when free blocks are getting tight it tries
to readjust/recalculate that value by syncing the FS.

Second stage will be resizing the data/metadata partitions.

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Fix nitpicky spacing and debug printout

Remove unneeded (and unused) inclusion of "opt_quota.h"