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| author | Zhen Lei <thunder.leizhen@huawei.com> | 2023-05-27 20:34:35 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-06-09 17:44:23 -0700 |
| commit | 6f22a744f4ee7a22be4704cf93bbe22decc7e79e (patch) | |
| tree | 0143ce59beda6527771a1b35113144fc7135d0ad /kernel/kexec_core.c | |
| parent | 1cba6c4309f03de570202c46f03df3f73a0d4c82 (diff) | |
| download | linux-6f22a744f4ee7a22be4704cf93bbe22decc7e79e.tar.gz linux-6f22a744f4ee7a22be4704cf93bbe22decc7e79e.tar.bz2 linux-6f22a744f4ee7a22be4704cf93bbe22decc7e79e.zip | |
kexec: delete a useless check in crash_shrink_memory()
The check '(crashk_res.parent != NULL)' is added by commit e05bd3367bd3
("kexec: fix Oops in crash_shrink_memory()"), but it's stale now. Because
if 'crashk_res' is not reserved, it will be zero in size and will be
intercepted by the above 'if (new_size >= old_size)'.
Ago:
if (new_size >= end - start + 1)
Now:
old_size = (end == 0) ? 0 : end - start + 1;
if (new_size >= old_size)
Link: https://lkml.kernel.org/r/20230527123439.772-3-thunder.leizhen@huawei.com
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Cong Wang <amwang@redhat.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/kexec_core.c')
| -rw-r--r-- | kernel/kexec_core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c index 22acee18195a..d1ab139dd490 100644 --- a/kernel/kexec_core.c +++ b/kernel/kexec_core.c @@ -1137,7 +1137,7 @@ int crash_shrink_memory(unsigned long new_size) end = start + new_size; crash_free_reserved_phys_range(end, crashk_res.end); - if ((start == end) && (crashk_res.parent != NULL)) + if (start == end) release_resource(&crashk_res); ram_res->start = end; |