Revision 0f8c0234f275c8198cbb68f16e035fa46254e372 authored by Randy Dunlap on 15 November 2007, 00:58:45 UTC, committed by Linus Torvalds on 15 November 2007, 02:45:37 UTC
chipsfb uses PCI interfaces and should depend on PCI. CC drivers/video/chipsfb.o drivers/video/chipsfb.c: In function 'chipsfb_pci_init': drivers/video/chipsfb.c:378: error: implicit declaration of function 'pci_request_region' drivers/video/chipsfb.c:435: error: implicit declaration of function 'pci_release_region' make[2]: *** [drivers/video/chipsfb.o] Error 1 make[1]: *** [drivers/video] Error 2 make: *** [drivers] Error 2 !CONFIG_PCI causes the build to fail. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 108b4c3
int_sqrt.c
#include <linux/kernel.h>
#include <linux/module.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 op, res, one;
op = x;
res = 0;
one = 1UL << (BITS_PER_LONG - 2);
while (one > op)
one >>= 2;
while (one != 0) {
if (op >= res + one) {
op = op - (res + one);
res = res + 2 * one;
}
res /= 2;
one /= 4;
}
return res;
}
EXPORT_SYMBOL(int_sqrt);
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