the mapping is:
VM_PAGER_OK 0
VM_PAGER_BAD <unused>
VM_PAGER_FAIL <unused>
VM_PAGER_PEND 0 (see below)
VM_PAGER_ERROR EIO
VM_PAGER_AGAIN EAGAIN
VM_PAGER_UNLOCK EBUSY
VM_PAGER_REFAULT ERESTART
for async i/o requests, it used to be possible for the request to
be convert to sync, and the pager would return VM_PAGER_OK or VM_PAGER_PEND
to indicate whether the caller should perform post-i/o cleanup.
this is no longer allowed; pagers must now return 0 to indicate that
the async i/o was successfully started, and the caller never needs to
worry about doing the post-i/o cleanup.
1. don't use MB_CUR_MAX, but MB_LEN_MAX because MB_CUR_MAX is a variable.
2. return a size_t type.
3. added const cond on do while macros.
4. remove unused variables and code,
support, which corresponds to one for each CPU_* option, or one for each
cpufunc structure.
Also remove some more residual code for the support of multiple and non-ARM
CPUs.
return NULL instead of restarting the loop since we might sleep
while starting the i/o. this tells getblk() to check if someone else
created the buffer while we slept. from OpenBSD.
Patch by Hubert Feyrer.
Note: REQ support has been taken out of bsd.pkg.mk in v1.628; since
pkg_create still supports it, we should support it in pkg_info too,
though.
- Load the DMA address a byte at a time, and
- Use bus_space_read_stream_2() instead of bus_space_read_2() when reading
the byte-stream of configuration data from the card.
Sanity-checked on both i386 and sandpoint. Reviewed by ad.
LDSTATIC Control program linking; if set blank, link everything
dynamically. If set to "-static", link everything statically.
If not set, programs link according to their makefile.
The shquote() and shquotev() functions copy strings and transform the
copies by adding shell escape and quoting characters. They are used to
encapsulate arguments to be included in command strings passed to the
system() and popen() functions, so that the arguments will have the cor-
rect values after being evaluated by the shell.
commands -- profiling shows this to be a major win over flushing the
entire cache (since the likelihood is that such lines won't be in the
cache anyway).
Patch supplied by Richard Earnshaw.
