mirror of
https://github.com/torvalds/linux.git
synced 2026-09-25 21:21:09 -04:00
Dan Williams
a4574f63ed
The 'struct resource' in 'struct dev_pagemap' is only used for holding resource span information. The other fields, 'name', 'flags', 'desc', 'parent', 'sibling', and 'child' are all unused wasted space. This is in preparation for introducing a multi-range extension of devm_memremap_pages(). The bulk of this change is unwinding all the places internal to libnvdimm that used 'struct resource' unnecessarily, and replacing instances of 'struct dev_pagemap'.res with 'struct dev_pagemap'.range. P2PDMA had a minor usage of the resource flags field, but only to report failures with "%pR". That is replaced with an open coded print of the range. [[email protected]: mm/hmm/test: use after free in dmirror_allocate_chunk()] Link: https://lkml.kernel.org/r/20200926121402.GA7467@kadam Signed-off-by: Dan Williams <[email protected]> Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Reviewed-by: Boris Ostrovsky <[email protected]> [xen] Cc: Paul Mackerras <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Vishal Verma <[email protected]> Cc: Vivek Goyal <[email protected]> Cc: Dave Jiang <[email protected]> Cc: Ben Skeggs <[email protected]> Cc: David Airlie <[email protected]> Cc: Daniel Vetter <[email protected]> Cc: Ira Weiny <[email protected]> Cc: Bjorn Helgaas <[email protected]> Cc: Juergen Gross <[email protected]> Cc: Stefano Stabellini <[email protected]> Cc: "Jérôme Glisse" <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Ard Biesheuvel <[email protected]> Cc: Ard Biesheuvel <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brice Goglin <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Dave Hansen <[email protected]> Cc: David Hildenbrand <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: "H. Peter Anvin" <[email protected]> Cc: Hulk Robot <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: Jason Yan <[email protected]> Cc: Jeff Moyer <[email protected]> Cc: Jia He <[email protected]> Cc: Joao Martins <[email protected]> Cc: Jonathan Cameron <[email protected]> Cc: kernel test robot <[email protected]> Cc: Mike Rapoport <[email protected]> Cc: Pavel Tatashin <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: "Rafael J. Wysocki" <[email protected]> Cc: Randy Dunlap <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Tom Lendacky <[email protected]> Cc: Wei Yang <[email protected]> Cc: Will Deacon <[email protected]> Link: https://lkml.kernel.org/r/159643103173.4062302.768998885691711532.stgit@dwillia2-desk3.amr.corp.intel.com Link: https://lkml.kernel.org/r/160106115761.30709.13539840236873663620.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Linus Torvalds <[email protected]>
38 lines
775 B
C
38 lines
775 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_RANGE_H
|
|
#define _LINUX_RANGE_H
|
|
#include <linux/types.h>
|
|
|
|
struct range {
|
|
u64 start;
|
|
u64 end;
|
|
};
|
|
|
|
static inline u64 range_len(const struct range *range)
|
|
{
|
|
return range->end - range->start + 1;
|
|
}
|
|
|
|
int add_range(struct range *range, int az, int nr_range,
|
|
u64 start, u64 end);
|
|
|
|
|
|
int add_range_with_merge(struct range *range, int az, int nr_range,
|
|
u64 start, u64 end);
|
|
|
|
void subtract_range(struct range *range, int az, u64 start, u64 end);
|
|
|
|
int clean_sort_range(struct range *range, int az);
|
|
|
|
void sort_range(struct range *range, int nr_range);
|
|
|
|
#define MAX_RESOURCE ((resource_size_t)~0)
|
|
static inline resource_size_t cap_resource(u64 val)
|
|
{
|
|
if (val > MAX_RESOURCE)
|
|
return MAX_RESOURCE;
|
|
|
|
return val;
|
|
}
|
|
#endif
|