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Trim a few comments on platforms that did not implement mmap of /dev/kmem.

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After r307332, no platforms implement mmap for /dev/kmem, so the lack of
it for these platforms is no longer unique.
This commit is contained in:
John Baldwin 2017-01-13 21:52:53 +00:00
parent b44047f3df
commit e2c14d90df
2 changed files with 1 additions and 7 deletions
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6
sys/mips/mips/mem.c
View file

@ -151,12 +151,6 @@ int
memmmap(struct cdev *dev, vm_ooffset_t offset, vm_paddr_t *paddr,
int prot, vm_memattr_t *memattr)
{
/*
* /dev/mem is the only one that makes sense through this
* interface. For /dev/kmem any physaddr we return here
* could be transient and hence incorrect or invalid at
* a later time.
*/
if (dev2unit(dev) != CDEV_MINOR_MEM)
return (-1);

2
sys/sparc64/sparc64/mem.c
View file

@ -43,7 +43,7 @@ __FBSDID("$FreeBSD$");
/*
* Memory special file
*
* NOTE: other architectures support mmap()'ing the mem and kmem devices; this
* NOTE: other architectures support mmap()'ing the mem device; this
* might cause illegal aliases to be created for the locked kernel page(s), so
* it is not implemented.
*/