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authorDavid Hildenbrand <david@redhat.com>2021-11-08 18:31:44 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-11-09 10:02:48 -0800
commit2c9feeaedfe1f34c4e327cb6f9b8b90052edced1 (patch)
tree9371cb7d79b1c9659eeb07ad78262c1083a66613 /fs/proc
parent934fadf438b33f3fe952924702eb3254e1884d2f (diff)
downloadlwn-2c9feeaedfe1f34c4e327cb6f9b8b90052edced1.tar.gz
lwn-2c9feeaedfe1f34c4e327cb6f9b8b90052edced1.zip
proc/vmcore: let pfn_is_ram() return a bool
The callback should deal with errors internally, it doesn't make sense to expose these via pfn_is_ram(). We'll rework the callbacks next. Right now we consider errors as if "it's RAM"; no functional change. Link: https://lkml.kernel.org/r/20211005121430.30136-5-david@redhat.com Signed-off-by: David Hildenbrand <david@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Dave Young <dyoung@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Oscar Salvador <osalvador@suse.de> Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/vmcore.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 9a15334da208..a9bd80ab670e 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -84,11 +84,11 @@ void unregister_oldmem_pfn_is_ram(void)
}
EXPORT_SYMBOL_GPL(unregister_oldmem_pfn_is_ram);
-static int pfn_is_ram(unsigned long pfn)
+static bool pfn_is_ram(unsigned long pfn)
{
int (*fn)(unsigned long pfn);
/* pfn is ram unless fn() checks pagetype */
- int ret = 1;
+ bool ret = true;
/*
* Ask hypervisor if the pfn is really ram.
@@ -97,7 +97,7 @@ static int pfn_is_ram(unsigned long pfn)
*/
fn = oldmem_pfn_is_ram;
if (fn)
- ret = fn(pfn);
+ ret = !!fn(pfn);
return ret;
}
@@ -124,7 +124,7 @@ ssize_t read_from_oldmem(char *buf, size_t count,
nr_bytes = count;
/* If pfn is not ram, return zeros for sparse dump files */
- if (pfn_is_ram(pfn) == 0)
+ if (!pfn_is_ram(pfn))
memset(buf, 0, nr_bytes);
else {
if (encrypted)