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checkpatch: add new alloc functions to alloc with multiplies check 

kvmalloc() and kvzalloc() functions have now 2-factor multiplication
argument forms kvmalloc_array() and kvcalloc(), correspondingly.

Add alloc-with-multiplies checks for these new functions.

Link: https://github.com/KSPP/linux/issues/187
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
This commit is contained in:
Gustavo A. R. Silva 2022-04-26 00:32:12 -05:00
parent ce522ba9ef
commit 73f1d07e5f
1 changed files with 5 additions and 3 deletions
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8
scripts/checkpatch.pl
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@ -7033,14 +7033,16 @@ sub process {
"Prefer $3(sizeof(*$1)...) over $3($4...)\n" . $herecurr);
}
# check for k[mz]alloc with multiplies that could be kmalloc_array/kcalloc
# check for (kv|k)[mz]alloc with multiplies that could be kmalloc_array/kvmalloc_array/kvcalloc/kcalloc
if ($perl_version_ok &&
defined $stat &&
$stat =~ /^\+\s*($Lval)\s*\=\s*(?:$balanced_parens)?\s*(k[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)\s*,/) {
$stat =~ /^\+\s*($Lval)\s*\=\s*(?:$balanced_parens)?\s*((?:kv|k)[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)\s*,/) {
my $oldfunc = $3;
my $a1 = $4;
my $a2 = $10;
my $newfunc = "kmalloc_array";
$newfunc = "kvmalloc_array" if ($oldfunc eq "kvmalloc");
$newfunc = "kvcalloc" if ($oldfunc eq "kvzalloc");
$newfunc = "kcalloc" if ($oldfunc eq "kzalloc");
my $r1 = $a1;
my $r2 = $a2;
@ -7057,7 +7059,7 @@ sub process {
"Prefer $newfunc over $oldfunc with multiply\n" . $herectx) &&
$cnt == 1 &&
$fix) {
$fixed[$fixlinenr] =~ s/\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*(k[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)/$1 . ' = ' . "$newfunc(" . trim($r1) . ', ' . trim($r2)/e;
$fixed[$fixlinenr] =~ s/\b($Lval)\s*\=\s*(?:$balanced_parens)?\s*((?:kv|k)[mz]alloc)\s*\(\s*($FuncArg)\s*\*\s*($FuncArg)/$1 . ' = ' . "$newfunc(" . trim($r1) . ', ' . trim($r2)/e;
}
}
}