From 4df3504e2f17cb35d2c12b07e716ae37971d0d52 Mon Sep 17 00:00:00 2001 From: Simon Horman Date: Thu, 25 May 2023 16:26:25 +0200 Subject: kexec: avoid calculating array size twice Avoid calculating array size twice in kexec_purgatory_setup_sechdrs(). Once using array_size(), and once open-coded. Flagged by Coccinelle: .../kexec_file.c:881:8-25: WARNING: array_size is already used (line 877) to compute the same size No functional change intended. Compile tested only. Link: https://lkml.kernel.org/r/20230525-kexec-array_size-v1-1-8b4bf4f7500a@kernel.org Signed-off-by: Simon Horman Acked-by: Baoquan He Cc: Eric W. Biederman Cc: Zhen Lei Signed-off-by: Andrew Morton --- kernel/kexec_file.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'kernel/kexec_file.c') diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index f989f5f1933b..3f5677679744 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -867,6 +867,7 @@ static int kexec_purgatory_setup_sechdrs(struct purgatory_info *pi, { unsigned long bss_addr; unsigned long offset; + size_t sechdrs_size; Elf_Shdr *sechdrs; int i; @@ -874,11 +875,11 @@ static int kexec_purgatory_setup_sechdrs(struct purgatory_info *pi, * The section headers in kexec_purgatory are read-only. In order to * have them modifiable make a temporary copy. */ - sechdrs = vzalloc(array_size(sizeof(Elf_Shdr), pi->ehdr->e_shnum)); + sechdrs_size = array_size(sizeof(Elf_Shdr), pi->ehdr->e_shnum); + sechdrs = vzalloc(sechdrs_size); if (!sechdrs) return -ENOMEM; - memcpy(sechdrs, (void *)pi->ehdr + pi->ehdr->e_shoff, - pi->ehdr->e_shnum * sizeof(Elf_Shdr)); + memcpy(sechdrs, (void *)pi->ehdr + pi->ehdr->e_shoff, sechdrs_size); pi->sechdrs = sechdrs; offset = 0; -- cgit v1.2.3