Messages in this thread Patch in this message | | | Date | Fri, 9 May 2003 11:54:07 -0700 | From | William Lee Irwin III <> | Subject | Re: 2.5.69-mm3 |
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On Fri, May 09, 2003 at 11:15:35AM -0700, William Lee Irwin III wrote: +static inline int __next_node_with_cpus(int node) +{ + do + ++node; + while (!nr_cpus_node(node) && node < numnodes); + return node; +}
GRRR, neither seems to hurt my booting it or cause warnings but there are two mistakes:
(1) not checking node < numnodes before !nr_cpus_node() (2) casting the arg of generic_hweight32() to unsigned long is wrong
Fixed patch(es) below.
-- wli
diff -urpN mm3-2.5.69-1/include/linux/bitops.h mm3-2.5.69-2/include/linux/bitops.h --- mm3-2.5.69-1/include/linux/bitops.h 2003-05-09 09:22:16.000000000 -0700 +++ mm3-2.5.69-2/include/linux/bitops.h 2003-05-09 11:30:09.000000000 -0700 @@ -1,5 +1,6 @@ #ifndef _LINUX_BITOPS_H #define _LINUX_BITOPS_H +#include <asm/types.h> #include <asm/bitops.h> /* @@ -107,11 +108,14 @@ static inline unsigned int generic_hweig return (res & 0x0F) + ((res >> 4) & 0x0F); } -#if (BITS_PER_LONG == 64) - -static inline u64 generic_hweight64(u64 w) +static inline unsigned long generic_hweight64(u64 w) { - u64 res = (w & 0x5555555555555555) + ((w >> 1) & 0x5555555555555555); + u64 res; + if (sizeof(unsigned long) == 4) + return generic_hweight32((unsigned int)(w >> 32)) + + generic_hweight32((unsigned int)w); + + res = (w & 0x5555555555555555) + ((w >> 1) & 0x5555555555555555); res = (res & 0x3333333333333333) + ((res >> 2) & 0x3333333333333333); res = (res & 0x0F0F0F0F0F0F0F0F) + ((res >> 4) & 0x0F0F0F0F0F0F0F0F); res = (res & 0x00FF00FF00FF00FF) + ((res >> 8) & 0x00FF00FF00FF00FF); @@ -119,22 +123,9 @@ static inline u64 generic_hweight64(u64 return (res & 0x00000000FFFFFFFF) + ((res >> 32) & 0x00000000FFFFFFFF); } -#define hweight_long(w) generic_hweight64(w) - -#endif /* BITS_PER_LONG == 64 */ - -#if (BITS_PER_LONG == 32) - -static inline unsigned int generic_hweight64(unsigned int *w) +static inline unsigned long hweight_long(unsigned long x) { - return generic_hweight32(w[0]) + generic_hweight32(w[1]); + return sizeof(x) == 4 ? generic_hweight32(x) : generic_hweight64(x); } -#define hweight_long(w) generic_hweight32(w) - -#endif /* BITS_PER_LONG == 32 */ - -#include <asm/bitops.h> - - #endif diff -urpN mm3-2.5.69-1/include/linux/topology.h mm3-2.5.69-2/include/linux/topology.h --- mm3-2.5.69-1/include/linux/topology.h 2003-05-09 09:22:16.000000000 -0700 +++ mm3-2.5.69-2/include/linux/topology.h 2003-05-09 11:29:52.000000000 -0700 @@ -32,8 +32,15 @@ #define nr_cpus_node(node) (hweight_long(node_to_cpumask(node))) +static inline int __next_node_with_cpus(int node) +{ + do + ++node; + while (node < numnodes && !nr_cpus_node(node)); + return node; +} + #define for_each_node_with_cpus(node) \ - for (node = 0; node < numnodes; node++) \ - if (nr_cpus_node(node) + for (node = 0; node < numnodes; node = __next_node_with_cpus(node)) #endif /* _LINUX_TOPOLOGY_H */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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