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Grab Giant in physio() since non-giant drivers are starting to appear.

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Poul-Henning Kamp 2003-08-02 09:40:53 +00:00
parent e4bbcfbc42
commit f7e56e489d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=118352
1 changed files with 3 additions and 0 deletions
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3
sys/kern/kern_physio.c
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@ -41,6 +41,8 @@ physio(dev_t dev, struct uio *uio, int ioflag)
u_int iolen;
struct buf *bp;
/* We cannot trust the device driver to hold Giant for us */
mtx_lock(&Giant);
/* Keep the process UPAGES from being swapped. XXX: why ? */
PHOLD(curproc);
@ -122,5 +124,6 @@ physio(dev_t dev, struct uio *uio, int ioflag)
doerror:
relpbuf(bp, NULL);
PRELE(curproc);
mtx_unlock(&Giant);
return (error);
}