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Jason Zaman 8fc851b7b5 sysmacros: Make P2ROUNDUP not trigger int overflow 
The original P2ROUNDUP and P2ROUNDUP_TYPED macros contain -x which
triggers PaX's integer overflow detection for unsigned integers.
Replace the macros with an equivalent version that does not trigger
the overflow.

Axioms:
A. (-(x)) === (~((x) - 1)) === (~(x) + 1) under two's complement.
B. ~(x & y) === ((~(x)) | (~(y))) under De Morgan's law.
C. ~(~x) === x under the law of excluded middle.

Proof:
0. (-(-(x) & -(align))) original
1. (~(-(x) & -(align)) + 1) by A
2. (((~(-(x))) | (~(-(align)))) + 1) by B
3. (((~(~((x) - 1))) | (~(~((align) - 1)))) + 1) by A
4. (((((x) - 1)) | (((align) - 1))) + 1) by C
Q.E.D.

Signed-off-by: Jason Zaman <jason@perfinion.com>
Reviewed-by: Chris Dunlop <chris@onthe.net.au>
Reviewed-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes zfsonlinux/zfs#2505
Closes #488
2015-11-13 15:21:52 -08:00
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fm
Kernel header installation should respect --prefix
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fs
Kernel header installation should respect --prefix
2014-10-28 09:31:48 -07:00
sysevent
Kernel header installation should respect --prefix
2014-10-28 09:31:48 -07:00
acl_impl.h
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acl.h
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atomic.h
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2014-10-17 15:11:50 -07:00
attr.h
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bitmap.h
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bootconf.h
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bootprops.h
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buf.h
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byteorder.h
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callb.h
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callo.h
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2013-11-04 09:49:24 -08:00
cmn_err.h
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compress.h
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condvar.h
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conf.h
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console.h
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cpupart.h
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cpuvar.h
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crc32.h
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cred.h
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ctype.h
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ddi.h
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debug.h
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dirent.h
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disp.h
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dkio.h
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dklabel.h
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dnlc.h
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dumphdr.h
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efi_partition.h
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errno.h
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file.h
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idmap.h
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int_limits.h
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int_types.h
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inttypes.h
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isa_defs.h
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2014-04-25 15:25:32 -07:00
kidmap.h
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kmem_cache.h
Fix CPU hotplug
2015-10-13 09:50:40 -07:00
kmem.h
Add hooks for disabling direct reclaim
2015-01-16 13:55:09 -08:00
kobj.h
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kstat.h
3537 add kstat_waitq_enter and friends
2013-10-25 13:41:52 -07:00
list.h
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Makefile.am
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mkdev.h
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mntent.h
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mode.h
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mount.h
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mutex.h
Don't allow shrinking a PF_FSTRANS context
2015-04-03 11:32:31 -07:00
note.h
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open.h
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proc.h
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processor.h
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resource.h
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rwlock.h
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sdt.h
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sid.h
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signal.h
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stropts.h
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sunddi.h
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sunldi.h
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sysdc.h
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sysevent.h
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sysmacros.h
sysmacros: Make P2ROUNDUP not trigger int overflow
2015-11-13 15:21:52 -08:00
systeminfo.h
Simplify hostid logic
2014-04-14 09:04:41 -07:00
systm.h
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t_lock.h
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taskq.h
Invert minclsyspri and maxclsyspri
2015-07-28 13:59:03 -07:00
thread.h
De-inline spl_kthread_create().
2014-04-09 19:17:12 -07:00
time.h
Use current_kernel_time() in the time compatibility wrappers
2015-01-16 13:54:35 -08:00
timer.h
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2014-04-14 09:32:01 -07:00
tsd.h
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types32.h
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types.h
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2015-01-16 13:55:08 -08:00
u8_textprep.h
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uio.h
Restructure uio to accommodate bio_vec
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unistd.h
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user.h
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va_list.h
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varargs.h
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vfs_opreg.h
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vfs.h
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vmem.h
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2015-06-29 09:26:29 -07:00
vmsystm.h
Include other sources of freeable memory in the freemem calculation
2015-08-19 09:25:30 -07:00
vnode.h
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zmod.h
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zone.h
Add crgetzoneid() stub
2015-04-02 09:49:55 -07:00