The do_gettimeofday() helper was removed by commit e4b92b108c6c
("timekeeping: remove obsolete time accessors") in v5.0-rc1. Bring it back
for users in vmmon-only/linux/hostif.c.
This feels like a quick and clumsy band aid to allow build with post-4.20
kernels. On a closer look, the whole gymnastics around uptimeState and
HostIFReadUptimeWork() with jiffies and wall time checking and correcting
each other seems to be a workaround for an absence of high resolution
monotonic time. Considering ktime_get_ts64() is available since 3.17 and
before that, ktime_get_ts() since 2.6.17, perhaps the time has come to
clean all this machinery up. But something like this would be beyond the
scope of this repository.
Since commit ca79b0c211af ("mm: convert totalram_pages and totalhigh_pages
variables to atomic") in v5.0-rc1, totalram_pages() is an accessor function
and the actual variable is an atomic.
Since commit 11c5ad0ec441 ("eventpoll: switch to ->poll_mask") in
v4.18-rc1, eventpoll switched from ->poll() to ->poll_mask(). Rather than
calling the callback directly (which would result in null pointer
dereference), use vfs_poll() wrapper. As this wrapper is only available
since 4.18-rc1 cycle as well, provide a copy to use when building against
older kernels.
Function declared with __attribute__((always_inline)) should also be
declared as inline, otherwise gcc issues a warning "always_inline function
might not be inlinable". It's just cosmetic but getting rid of known
harmless warnings makes it easier to spot actual problems. Use the
__always_inline macro for LinuxDriverSyncReadTSCs() as this is how always
inline functions should be declared in kernel code.
With version 4.15-rc1, conversion to new timer interface is finished and
old interface using init_timer() is no longer available. Convert all users
to new one.
global_page_state() was renamed to global_zone_page_state() by commit
c41f012ade0b ("mm: rename global_page_state to global_zone_page_state").
However, some more changes are needed (and were in fact needed even with
kernels older than 4.14.
Since commit 385386cff4c6 ("mm: vmstat: move slab statistics from zone to
node counters") in v4.13-rc1, NR_SLAB_UNRECLAIMABLE needs to be used with
global_node_page_state(), in-tree callers were fixed by commit d507e2ebd2c7
("mm: fix global NR_SLAB_.*CLAIMABLE counter reads").
Since commit 599d0c954f91 ("mm, vmscan: move LRU lists to node") in
v4.8-rc1, NR_UNEVICTABLE needs global_node_page_state() rather than
global_page_state().
Since commit 50658e2e04c1 ("mm: move page mapped accounting to the node")
in v4.8-rc1, NR_ANON_PAGES needs global_node_page_state() as well. This was
shortly before it was renamed to NR_ANON_MAPPED but as both got into
mainline in v4.8-rc1, we can do with one #ifdef.
To keep HostIF_EstimateLockedPageLimit() readable, extract the version
dependent calls into inline helpers.
Michal Kubecek