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Code Issues Releases Activity

make swapon() MPSAFE (will adjust syscalls.master later)

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This commit is contained in:
Matthew Dillon 2001-08-31 22:15:37 +00:00
parent 7e39632bc8
commit 7feaf028be
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=82699
1 changed files with 13 additions and 5 deletions
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18
sys/vm/vm_swap.c
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@ -183,6 +183,9 @@ struct swapon_args {
};
#endif
/*
* MPSAFE
*/
/* ARGSUSED */
int
swapon(p, uap)
@ -194,21 +197,25 @@ swapon(p, uap)
struct nameidata nd;
int error;
mtx_lock(&Giant);
error = suser(p);
if (error)
return (error);
goto done2;
/*
* Swap metadata may not fit in the KVM if we have physical
* memory of >1GB.
*/
if (swap_zone == NULL)
return (ENOMEM);
if (swap_zone == NULL) {
error = ENOMEM;
goto done2;
}
NDINIT(&nd, LOOKUP, FOLLOW, UIO_USERSPACE, uap->name, p);
error = namei(&nd);
if (error)
return (error);
goto done2;
NDFREE(&nd, NDF_ONLY_PNBUF);
vp = nd.ni_vp;
@ -226,7 +233,8 @@ swapon(p, uap)
if (error)
vrele(vp);
done2:
mtx_unlock(&Giant);
return (error);
}