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i386: avoid a write only variable 

Compiling with GCC 4.6.0 20100925 produced warnings:
/src/qemu/target-i386/op_helper.c: In function 'switch_tss':
/src/qemu/target-i386/op_helper.c:283:53: error: variable 'new_trap' set but not used [-Werror=unused-but-set-variable]

Fix by adding a dummy cast so that the variable is not unused. Add also
pointer to docs.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Blue Swirl 2010-10-13 18:38:08 +00:00
parent 2ded6ad761
commit 4581cbcdc3
1 changed files with 4 additions and 0 deletions
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4
target-i386/op_helper.c
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@ -349,6 +349,10 @@ static void switch_tss(int tss_selector,
new_segs[R_GS] = 0;
new_trap = 0;
}
/* XXX: avoid a compiler warning, see
http://support.amd.com/us/Processor_TechDocs/24593.pdf
chapters 12.2.5 and 13.2.4 on how to implement TSS Trap bit */
(void)new_trap;
/* NOTE: we must avoid memory exceptions during the task switch,
so we make dummy accesses before */