On Wednesday, December 24, 2014 9:05:47 pm Rui Paulo wrote: > On Dec 24, 2014, at 17:31, Ian Lepore <i...@freebsd.org> wrote: > > In every architecture and every place it's used, or just arm just here? > > You're right, it can be found at least in MIPS and amd64. > > > This appears to be an idiom, or at least something that has been pasted > > in identical form in every arch so far. > > The idiom is a bit different in amd64: the variable in the for-loop isn't immediately reused, but it's a global variable anyway... That's what I thought deserves a comment. > > Regarding the pmap_kenter_temporary(), the first problem is the function name: it might be a temporary mapping, but the real use is for crash dumps (I wonder why ACPI abuses this mapping). The other problem is the fact that a pmap function is so tied to crash dumps. However, that's a bigger problem.
ACPI abuses it because it is available (and we can't possibly generate a crash dump early when ACPI uses it). ACPI is only use it to map ACPI tables before the VM system is initalized enough to map the tables using normal KVA. -- John Baldwin _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
