is IOP_MAX_MSG_XFERS and it's three. iop_systab_set() makes three ximit
buffers. In this case, iop_msg_unmap() overrruns by "if((++ix)->ix_size == 0)".
Check overrun first.
This change fixes a bug that iop(4) panics while attaching iopsp(4).
designated initializers.
I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.
1) Move core entropy-pool code and source/sink/sample management code
to sys/kern from sys/dev.
2) Remove use of NRND as test for presence of entropy-pool code throughout
source tree.
3) Remove use of RND_ENABLED in device drivers as microoptimization to
avoid expensive operations on disabled entropy sources; make the
rnd_add calls do this directly so all callers benefit.
4) Fix bug in recent rnd_add_data()/rnd_add_uint32() changes that might
have lead to slight entropy overestimation for some sources.
5) Add new source types for environmental sensors, power sensors, VM
system events, and skew between clocks, with a sample implementation
for each.
ok releng to go in before the branch due to the difficulty of later
pullup (widespread #ifdef removal and moved files). Tested with release
builds on amd64 and evbarm and live testing on amd64.
same issue. Also add a BUS_DMASYNC_POSTWRITE to the POLL operation.
Problem pointed out by tsutsui@.
Still not perfect (a BUS_DMASYNC_PREREAD would be needed after the
testing the condition in the POLL() macro), but closer.
- Addresses the issue described in PR/38828.
- Some simplification in threading and sleepq subsystems.
- Eliminates pmap_collect() and, as a side note, allows pmap optimisations.
- Eliminates XS_CTL_DATA_ONSTACK in scsipi code.
- Avoids few scans on LWP list and thus potentially long holds of proc_lock.
- Cuts ~1.5k lines of code. Reduces amd64 kernel size by ~4k.
- Removes __SWAP_BROKEN cases.
Tested on x86, mips, acorn32 (thanks <mpumford>) and partly tested on
acorn26 (thanks to <bjh21>).
Discussed on <tech-kern>, reviewed by <ad>.
"poll" flag when called from ld_shutdown().
This is the infrastructure part of kern/38655 - in itself it doesn't
fix the panic referenced in that PR.
XXX: At least ld_twa.c and perhaps ld_iop.c and ld_icp.c need to
check for this new poll flag and do something useful.
of dv_xname, especially not to set the length of a buffer that
(apparently) belongs to the kernel ABI. Instead, set the buffer
length to 16, which is the current length of dv_xname.
need to understand the locking around that field. Instead of setting
B_ERROR, set b_error instead. b_error is 'owned' by whoever completes
the I/O request.
dholland