Cleanup unnecessary semicolons from the kernel.

Found with devel/coccinelle.

MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

MFH @r292599

This includes the pluggable TCP framework and other chnages to the
netstack to track for VNET stability.

Security: The FreeBSD Foundation

Fix breakage caused by r292373 in ZFS/FUSE/NFS/SMBFS.

With the new VOP_GETPAGES() KPI the "count" argument counts pages already,
and doesn't need to be translated from bytes to pages.

While here ma

Fix breakage caused by r292373 in ZFS/FUSE/NFS/SMBFS.

With the new VOP_GETPAGES() KPI the "count" argument counts pages already,
and doesn't need to be translated from bytes to pages.

While here make it consistent that *rbehind and *rahead are updated only
if we doesn't return error.

Pointy hat to: glebius

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A change to KPI of vm_pager_get_pages() and underlying VOP_GETPAGES().

o With new KPI consumers can request contiguous ranges of pages, and
unlike before, all pages will be kept busied on return,

A change to KPI of vm_pager_get_pages() and underlying VOP_GETPAGES().

o With new KPI consumers can request contiguous ranges of pages, and
unlike before, all pages will be kept busied on return, like it was
done before with the 'reqpage' only. Now the reqpage goes away. With
new interface it is easier to implement code protected from race
conditions.

Such arrayed requests for now should be preceeded by a call to
vm_pager_haspage() to make sure that request is possible. This
could be improved later, making vm_pager_haspage() obsolete.

Strenghtening the promises on the business of the array of pages
allows us to remove such hacks as swp_pager_free_nrpage() and
vm_pager_free_nonreq().

o New KPI accepts two integer pointers that may optionally point at
values for read ahead and read behind, that a pager may do, if it
can. These pages are completely owned by pager, and not controlled
by the caller.

This shifts the UFS-specific readahead logic from vm_fault.c, which
should be file system agnostic, into vnode_pager.c. It also removes
one VOP_BMAP() request per hard fault.

Discussed with: kib, alc, jeff, scottl
Sponsored by: Nginx, Inc.
Sponsored by: Netflix

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Merge from head@274682

Sync to HEAD@r272516.

IFC @r271694

Remove unused arguments for VOP_GETPAGES(), VOP_PUTPAGES().

Merge from head

IFC @ r254014

IFC @253398

Merge fresh head.

Change VM_OBJECT_LOCK/UNLOCK() -> VM_OBJECT_WLOCK/WUNLOCK() to reflect
the recent switch of the vm object lock to a rwlock.

Reported by: attilio

Sync with HEAD.

IFC @r243836

MFC

MFC @ r241285

Until now, smbfs_fullpath() computed the full path starting from the
vnode and following back the chain of n_parent pointers up to the root,
without acquiring the locks of the n_parent vnodes analyze

Until now, smbfs_fullpath() computed the full path starting from the
vnode and following back the chain of n_parent pointers up to the root,
without acquiring the locks of the n_parent vnodes analyzed during the
computation. This is immediately wrong because if the vnode lock is not
held there's no guarantee on the validity of the vnode pointer or the data.
In order to fix, store the whole path in the smbnode structure so that
smbfs_fullpath() can use this information.

Discussed with: kib
Reported and tested by: pho
Sponsored by: iXsystems inc.

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IFC @ r242684

Sync from head

Fix panic due to page faults while in kernel mode, under conditions of
VM pressure. The reason is that in some codepaths pointers to stack
variables were passed from one thread to another.

In collab

Fix panic due to page faults while in kernel mode, under conditions of
VM pressure. The reason is that in some codepaths pointers to stack
variables were passed from one thread to another.

In collaboration with: pho
Reported by: pho's stress2 suite
Sponsored by: iXsystems inc.

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Change the code to use %jd as printf() placeholder for uio_offset and
cast to intmax_t.

Suggested by: pjd
Sponsored by: iXsystems inc.

Fix build in case we have SMBVDEBUG turned on.

Reviewed by: gnn
Approved by: gnn
Sponsored by: iXsystems inc.

Merge head r233826 through r240095.