Re: [PATCH 1/1] x86: Make _syscallX() macros compile in PIC mode oni386

[Andrew Morton]

Markus Gutschke <markus@xxxxxxxxxx> wrote:
>
> Gcc reserves %ebx when compiling position-independent-code on i386. This 
>  means, the _syscallX() macros in include/asm-i386/unistd.h will not 
>  compile. This patch is against 2.6.15.6 and adds a new set of macros 
>  which will be used in PIC mode. These macros take special care to 
>  preserve %ebx.

But we don't compile the kernel with -fpic...  We might want to, for kdump
convenience at some stage, perhaps.

If we do, it'd be better to simply replace those _syscallX functions with
versions which work in either mode, rather than having two versions.

The syscallX() macros are almost obsolete - it's preferred that code simply
include syscalls.h and call sys_foo() directly.  But there are a few
hard-to-convert places, iirc.

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