From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 9 May 2003 11:54:07 -0700 From: William Lee Irwin III Subject: Re: 2.5.69-mm3 Message-ID: <20030509185407.GB8978@holomorphy.com> References: <20030508013958.157b27b7.akpm@digeo.com> <20030509181257.GB8931@holomorphy.com> <20030509181535.GZ8978@holomorphy.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030509181535.GZ8978@holomorphy.com> Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton , linux-kernel@vger.kernel.org, linux-mm@kvack.org List-ID: 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 #include /* @@ -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 - - #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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org