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x86/mm/pat: remove old pfnmap tracking interface

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We can now get rid of the old interface along with get_pat_info() and
follow_phys().

Link: https://lkml.kernel.org/r/20250512123424.637989-6-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Acked-by: Ingo Molnar <mingo@kernel.org>	[x86 bits]
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Betkov <bp@alien8.de>
Cc: Dave Airlie <airlied@gmail.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Jann Horn <jannh@google.com>
Cc: Jonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: Tvrtko Ursulin <tursulin@ursulin.net>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
David Hildenbrand
2025-05-12 14:34:18 +02:00
committed by Andrew Morton
parent f8e97613fe
commit 7bd7d74ec0
2 changed files with 0 additions and 213 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/pgtable.h
-66
View File
@@ -1485,17 +1485,6 @@ static inline pmd_t pmd_swp_clear_soft_dirty(pmd_t pmd)
* vmf_insert_pfn.
*/
/*
* track_pfn_remap is called when a _new_ pfn mapping is being established
* by remap_pfn_range() for physical range indicated by pfn and size.
*/
static inline int track_pfn_remap(struct vm_area_struct *vma, pgprot_t *prot,
unsigned long pfn, unsigned long addr,
unsigned long size)
{
return 0;
}
static inline int pfnmap_setup_cachemode(unsigned long pfn, unsigned long size,
pgprot_t *prot)
{
@@ -1511,55 +1500,7 @@ static inline int pfnmap_track(unsigned long pfn, unsigned long size,
static inline void pfnmap_untrack(unsigned long pfn, unsigned long size)
{
}
/*
* track_pfn_copy is called when a VM_PFNMAP VMA is about to get the page
* tables copied during copy_page_range(). Will store the pfn to be
* passed to untrack_pfn_copy() only if there is something to be untracked.
* Callers should initialize the pfn to 0.
*/
static inline int track_pfn_copy(struct vm_area_struct *dst_vma,
struct vm_area_struct *src_vma, unsigned long *pfn)
{
return 0;
}
/*
* untrack_pfn_copy is called when a VM_PFNMAP VMA failed to copy during
* copy_page_range(), but after track_pfn_copy() was already called. Can
* be called even if track_pfn_copy() did not actually track anything:
* handled internally.
*/
static inline void untrack_pfn_copy(struct vm_area_struct *dst_vma,
unsigned long pfn)
{
}
/*
* untrack_pfn is called while unmapping a pfnmap for a region.
* untrack can be called for a specific region indicated by pfn and size or
* can be for the entire vma (in which case pfn, size are zero).
*/
static inline void untrack_pfn(struct vm_area_struct *vma,
unsigned long pfn, unsigned long size,
bool mm_wr_locked)
{
}
/*
* untrack_pfn_clear is called in the following cases on a VM_PFNMAP VMA:
*
* 1) During mremap() on the src VMA after the page tables were moved.
* 2) During fork() on the dst VMA, immediately after duplicating the src VMA.
*/
static inline void untrack_pfn_clear(struct vm_area_struct *vma)
{
}
#else
extern int track_pfn_remap(struct vm_area_struct *vma, pgprot_t *prot,
unsigned long pfn, unsigned long addr,
unsigned long size);
/**
* pfnmap_setup_cachemode - setup the cachemode in the pgprot for a pfn range
* @pfn: the start of the pfn range
@@ -1614,13 +1555,6 @@ int pfnmap_track(unsigned long pfn, unsigned long size, pgprot_t *prot);
* Untrack a pfn range previously tracked through pfnmap_track().
*/
void pfnmap_untrack(unsigned long pfn, unsigned long size);
extern int track_pfn_copy(struct vm_area_struct *dst_vma,
struct vm_area_struct *src_vma, unsigned long *pfn);
extern void untrack_pfn_copy(struct vm_area_struct *dst_vma,
unsigned long pfn);
extern void untrack_pfn(struct vm_area_struct *vma, unsigned long pfn,
unsigned long size, bool mm_wr_locked);
extern void untrack_pfn_clear(struct vm_area_struct *vma);
#endif
/**