freebsd-dev/sys/i386
Dimitry Andric 0f166953f7 Use NLDT to get number of LDTs on i386
Compiling a GENERIC kernel for i386 with clang 8.0 results in the
following warning:

/usr/src/sys/i386/i386/sys_machdep.c:542:40: error: 'sizeof ((ldt))' will return the size of the pointer, not the array itself [-Werror,-Wsizeof-pointer-div]
        nldt = pldt != NULL ? pldt->ldt_len : nitems(ldt);
                                              ^~~~~~~~~~~
/usr/src/sys/sys/param.h:299:32: note: expanded from macro 'nitems'
#define nitems(x)       (sizeof((x)) / sizeof((x)[0]))
                         ~~~~~~~~~~~ ^

Indeed, 'ldt' is declared as 'union descriptor *', so nitems() is not
the right way to determine the number of LDTs.  Instead, the NLDT define
from sys/x86/include/segments.h should be used.

Reviewed by:	kib
MFC after:	3 days
Differential Revision: https://reviews.freebsd.org/D19074
2019-02-04 18:07:03 +00:00
..
acpica i386: Merge PAE and non-PAE pmaps into same kernel. 2019-01-30 02:07:13 +00:00
bios
cloudabi32
conf Make iflib a loadable module. 2019-01-31 19:05:56 +00:00
i386 Use NLDT to get number of LDTs on i386 2019-02-04 18:07:03 +00:00
include i386: Do not ever store to other-CPU counter64 slot. 2019-02-03 21:28:58 +00:00
linux Fix errno values returned from DUMMY_XATTR linuxulator calls 2019-01-11 07:58:25 +00:00
pci i386: Merge PAE and non-PAE pmaps into same kernel. 2019-01-30 02:07:13 +00:00
Makefile Remove iBCS2, part2: general kernel 2018-12-19 21:57:58 +00:00