/*
 * Copyright (C) 2013 Davidlohr Bueso <davidlohr.bueso@hp.com>
 *
 *  Based on the shift-and-subtract algorithm for computing integer
 *  square root from Guy L. Steele.
 */

#include <linux/kernel.h>
#include <linux/export.h>

/**
 * int_sqrt - rough approximation to sqrt
 * @x: integer of which to calculate the sqrt
 *
 * A very rough approximation to the sqrt() function.
 */
unsigned long int_sqrt(unsigned long x)
{
	unsigned long b, m, y = 0;

	if (x <= 1)
		return x;

	m = 1UL << (BITS_PER_LONG - 2);
	while (m != 0) {
		b = y + m;
		y >>= 1;

		if (x >= b) {
			x -= b;
			y += m;
		}
		m >>= 2;
	}

	return y;
}
EXPORT_SYMBOL(int_sqrt);
ader'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=86bc8b310f1f323ccc9a311933e35d3442473034'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=86bc8b310f1f323ccc9a311933e35d3442473034'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/pci?h=nds-private-remove&amp;id=86bc8b310f1f323ccc9a311933e35d3442473034'>pci</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/pci/oxygen?h=nds-private-remove&amp;id=86bc8b310f1f323ccc9a311933e35d3442473034'>oxygen</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/pci/oxygen/wm8785.h?h=nds-private-remove&amp;id=86bc8b310f1f323ccc9a311933e35d3442473034'>wm8785.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/pci/oxygen/wm8785.h?h=nds-private-remove&amp;id=86bc8b310f1f323ccc9a311933e35d3442473034&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
ue='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Arvind Yadav &lt;arvind.yadav.cs@gmail.com&gt;</td><td class='right'>2016-12-12 23:13:27 +0530</td></tr>
<tr><th>committer</th><td>Tejun Heo &lt;tj@kernel.org&gt;</td><td class='right'>2017-01-06 15:45:32 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/musb/cppi_dma.c?id=064c3db9c564cc5be514ac21fb4aa26cc33db746'>064c3db9c564cc5be514ac21fb4aa26cc33db746</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/musb/cppi_dma.c?id=064c3db9c564cc5be514ac21fb4aa26cc33db746'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=064c3db9c564cc5be514ac21fb4aa26cc33db746'>9875da27d40d874837ecca529ba42e54bcc56b10</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/musb/cppi_dma.c?id=064c3db9c564cc5be514ac21fb4aa26cc33db746'>drivers/usb/musb/cppi_dma.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/musb/cppi_dma.c?id=2dae99558e86894e9e5dbf097477baaa5eb70134'>2dae99558e86894e9e5dbf097477baaa5eb70134</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/musb/cppi_dma.c?id=064c3db9c564cc5be514ac21fb4aa26cc33db746&amp;id2=2dae99558e86894e9e5dbf097477baaa5eb70134'>diff</a>)</td></tr></table>
<div class='commit-subject'>ata: sata_mv:- Handle return value of devm_ioremap.</div><div class='commit-msg'>Here, If devm_ioremap will fail. It will return NULL.
Then hpriv-&gt;base = NULL - 0x20000; Kernel can run into
a NULL-pointer dereference. This error check will avoid
NULL pointer dereference.

Signed-off-by: Arvind Yadav &lt;arvind.yadav.cs@gmail.com&gt;
Signed-off-by: Tejun Heo &lt;tj@kernel.org&gt;
Cc: stable@vger.kernel.org
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=064c3db9c564cc5be514ac21fb4aa26cc33db746'>Diffstat</a> (limited to 'drivers/usb/musb/cppi_dma.c')</div><table summary='diffstat' class='diffstat'>