Commit Graph

12 Commits

Author SHA1 Message Date
jhb
4cc9f87fa2 Add atomic_readandclear_int and atomic_readandclear_long. 2000-10-05 22:19:50 +00:00
phk
6c07bccbf7 Introduce atomic_cmpset_int() and atomic_cmpset_long() from SMPng a
few hours earlier than the rest.

The next DEVFS commit needs these functions.

Alpha versions by: dfr
i386 versions by: jakeb

Approved by:    SMPng
2000-09-06 11:21:14 +00:00
obrien
5cfeff679b When using _asm{} in GCC, one must specify the operand's size if one
specifies the instruction's operation size.  GCC will default to 32-bit
operands reguardless of the prototype (ie, formal parameters' type)
of an inline function.
2000-05-10 01:15:55 +00:00
peter
556bfe0799 Use the rev 1.1.2.1 code from RELENG_3 for atomic operations rather
than the non-atomic C macros.
1999-10-04 16:24:08 +00:00
peter
fb976dbce4 Typo: s/__GNUC_MINOR_/__GNUC_MINOR__/
(__GNUC_MINOR__ on egcs in -current is "91" and is going to be "95" soon)
1999-10-04 16:18:04 +00:00
eivind
f53ad097bb Allow compilation with older versions of GCC, in order to make it possible
to bootstrap and work with -current from older versions of FreeBSD.
1999-10-03 21:15:25 +00:00
peter
3b842d34e8 $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
alc
999b998faa Create callable (non-inline) versions of the atomic_OP_TYPE functions
that are linked into the kernel.  The KLD compilation options are
changed to call these functions, rather than in-lining the
atomic operations.

This approach makes atomic operations from KLDs significantly
faster on UP systems (though somewhat slower on SMP systems).

PR:		i386/13111
Submitted by:	peter.jeremy@alcatel.com.au
1999-08-18 04:08:31 +00:00
alc
c9e1b9416b atomic.h:
Change "void *" to "volatile TYPE *", improving type safety
	and eliminating some warnings (e.g., mp_machdep.c rev 1.106).

cpufunc.h:
	Eliminate setbits.  As defined, it's not precisely correct;
	and it's redundant.  (Use atomic_set_int instead.)

ipl_funcs.c:
	Use atomic_set_int instead of setbits.

systm.h:
	Include atomic.h.

Reviewed by:	bde
1999-07-23 23:45:50 +00:00
alc
a7e05ba08c Commit the correct patch, i.e., the one that actually corresponds
to the rev 1.2 log entry.
1999-07-13 06:35:25 +00:00
alc
b27cbb2886 Changed the implementation of the primitives to guarantee atomicity
with respect to interrupts on UP systems.  (The upgrade from gcc 2.7.x
to egcs 1.1.2 produced at least one non-atomic code sequence in
swap_pager_getpages.)

In addition, the primitives are now SMP-safe, but only on SMPs.  (For
portability between SMPs and UPs, modules are compiled with the SMP-safe
versions.)

Submitted by:	dillon and myself
Reviewed by:	bde
1999-07-13 03:32:17 +00:00
dfr
5fdaeb281d Change various syscalls to use size_t arguments instead of u_int.
Add some overflow checks to read/write (from bde).

Change all modifications to vm_page::flags, vm_page::busy, vm_object::flags
and vm_object::paging_in_progress to use operations which are not
interruptable.

Reviewed by: Bruce Evans <bde@zeta.org.au>
1998-08-24 08:39:39 +00:00