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| author | Huang Ying <ying.huang@intel.com> | 2024-09-06 05:07:12 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-17 10:07:00 +0200 |
| commit | bacf9c3cbb18f7e3f67521516d881892f46bbcef (patch) | |
| tree | 23dbd2b4c5fcbd15db7702a59997c5c9b8060872 /kernel/resource.c | |
| parent | mm: z3fold: deprecate CONFIG_Z3FOLD (diff) | |
| download | linux-bacf9c3cbb18f7e3f67521516d881892f46bbcef.tar.xz linux-bacf9c3cbb18f7e3f67521516d881892f46bbcef.zip | |
resource: make alloc_free_mem_region() works for iomem_resource
During developing a kunit test case for region_intersects(), some fake
resources need to be inserted into iomem_resource. To do that, a resource
hole needs to be found first in iomem_resource.
However, alloc_free_mem_region() cannot work for iomem_resource now.
Because the start address to check cannot be 0 to detect address wrapping
0 in gfr_continue(), while iomem_resource.start == 0. To make
alloc_free_mem_region() works for iomem_resource, gfr_start() is changed
to avoid to return 0 even if base->start == 0. We don't need to check 0
as start address.
Link: https://lkml.kernel.org/r/20240906030713.204292-3-ying.huang@intel.com
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Jonathan Cameron <jonathan.cameron@huawei.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Cc: Alison Schofield <alison.schofield@intel.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Baoquan He <bhe@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/resource.c')
| -rw-r--r-- | kernel/resource.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/resource.c b/kernel/resource.c index 9f747bb7cd03..5e76b98c9771 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -1830,7 +1830,7 @@ static resource_size_t gfr_start(struct resource *base, resource_size_t size, return end - size + 1; } - return ALIGN(base->start, align); + return ALIGN(max(base->start, align), align); } static bool gfr_continue(struct resource *base, resource_size_t addr, |