Linus Torvalds 13c07b0286 linux/log2.h: Fix rounddown_pow_of_two(1) ... Exactly like roundup_pow_of_two(1), the rounddown version was buggy for the case of a compile-time constant '1' argument. Probably because it originated from the same code, sharing history with the roundup version from before the bugfix (for that one, see commit 1a06a52ee1: "Fix roundup_pow_of_two(1)"). However, unlike the roundup version, the fix for rounddown is to just remove the broken special case entirely. It's simply not needed - the generic code 1UL << ilog2(n) does the right thing for the constant '1' argment too. The only reason roundup needed that special case was because rounding up does so by subtracting one from the argument (and then adding one to the result) causing the obvious problems with "ilog2(0)". But rounddown doesn't do any of that, since ilog2() naturally truncates (ie "rounds down") to the right rounded down value. And without the ilog2(0) case, there's no reason for the special case that had the wrong value. tl;dr: rounddown_pow_of_two(1) should be 1, not 0. Acked-by: Dmitry Torokhov <dtor@vmware.com> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2011-12-12 22:06:55 -08:00
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acpi	Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux	2011-11-07 10:13:52 -08:00
asm-generic	asm-generic/unistd.h: support new process_vm_{readv,write} syscalls	2011-12-03 15:31:48 -05:00
crypto	crypto: Add a report function pointer to crypto_type	2011-10-21 14:24:03 +02:00
drm	drm/radeon/kms: add some new pci ids	2011-12-01 16:34:15 +00:00
keys
linux	linux/log2.h: Fix rounddown_pow_of_two(1)	2011-12-12 22:06:55 -08:00
math-emu
media	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
misc
mtd
net	sch_red: fix red_calc_qavg_from_idle_time	2011-11-30 23:27:22 -05:00
pcmcia
rdma	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband	2011-11-01 10:51:38 -07:00
rxrpc
scsi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6	2011-10-28 16:44:18 -07:00
sound	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
target	target: remove the unused se_dev_list	2011-12-06 06:00:57 +00:00
trace	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
video	ARM: OMAP: HWMOD: Unify DSS resets for OMAPs	2011-11-08 03:16:13 -07:00
xen	xen: Remove hanging references to CONFIG_XEN_PLATFORM_PCI	2011-11-16 12:13:42 -05:00
Kbuild