set_user_nice() not defined on 2.4.21+

[Joakim Tjernlund]

Hi

I had the impression that set_user_nice() would be in 2.4.21 when I added set_user_nice() to 
mtd/compatmac.h. I can change it to KERNEL_VERSION(2,5,0) or someone can
submit a patch to Marcelo.

    Jocke

> Hi,
> 
> When compiled JFFS2 with kernel 2.4.21-pre3, the linker complains that 
> the reference to set_user_nice() in function 
> jffs2_garbage_collect_thread() hasn't been defined. I traced the code 
> down to <linux/mtd/compatmac.h> and found that set_user_nice() is not 
> defined if linux verion is equal or greater than 2.4.21. See the code 
> below. Why? Does it mean that 2.4.21+ has already such a function 
> defined somewhere else or that 2.4.21+ doesn't need it? Actually I 
> searched 2.4.21-pre3 code and found no set_user_nice() defined except in 
> <linux/mtd/compatmac.h>. I guess it's possibly a bug.
> 
> #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)   /* Is this right? */
> #define set_user_nice(tsk, n) do { (tsk)->priority = 20-(n); } while(0)
> #elif LINUX_VERSION_CODE < KERNEL_VERSION(2,4,21) && 
> !defined(RED_HAT_LINUX_KERNEL)
> #define set_user_nice(tsk, n) do { (tsk)->nice = n; } while(0)
> #endif
> 
> -- 
> Shawn Jin
> RedSwitch Inc.
> 
> 
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