[lkml]   [2003]   [Feb]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Subject2.5.61: x86_64 num_online_cpus() buglet?

Kernel 2.5.61's include/asm-x86_64/smp.h contains:

extern unsigned long cpu_online_map;
extern inline unsigned int num_online_cpus(void)
return hweight32(cpu_online_map);

and similarly for cpu_callout_map.

hweight32() truncates a 64-bit operand to 32-bits, so either
- the maps should be int rather than long, or
- x86_64 needs to define and use a new hweight64(), or
- CONFIG_NR_CPUS must not exceed 32 on x86_64.


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:33    [W:0.042 / U:1.748 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site