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SubjectRe: [PATCH next] of/fdt: Fix defined but not used compiler warning
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Hi Kefeng,

If Rob agrees, I'd like to see one more change in this patch.

Since the only caller of of_fdt_match() is of_flat_dt_match(),
can you move the body of of_fdt_match() into of_flat_dt_match()
and eliminate of_fdt_match()?

(Noting that of_flat_dt_match() consists only of the call to
of_fdt_match().)

-Frank


On 6/11/19 6:00 PM, Kefeng Wang wrote:
> When CONFIG_OF_EARLY_FLATTREE is disabled, there is a compiler warning,
>
> drivers/of/fdt.c:129:19: warning: ‘of_fdt_match’ defined but not used [-Wunused-function]
> static int __init of_fdt_match(const void *blob, unsigned long node,
>
> Move of_fdt_match() and of_fdt_is_compatible() under CONFIG_OF_EARLY_FLATTREE
> to fix it.
>
> Cc: Stephen Boyd <swboyd@chromium.org>
> Cc: Rob Herring <robh@kernel.org>
> Cc: Frank Rowand <frowand.list@gmail.com>
> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
> ---
> drivers/of/fdt.c | 106 +++++++++++++++++++++++------------------------
> 1 file changed, 53 insertions(+), 53 deletions(-)
>
> diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
> index 3d36b5afd9bd..d6afd5b22940 100644
> --- a/drivers/of/fdt.c
> +++ b/drivers/of/fdt.c
> @@ -78,38 +78,6 @@ void __init of_fdt_limit_memory(int limit)
> }
> }
>
> -/**
> - * of_fdt_is_compatible - Return true if given node from the given blob has
> - * compat in its compatible list
> - * @blob: A device tree blob
> - * @node: node to test
> - * @compat: compatible string to compare with compatible list.
> - *
> - * On match, returns a non-zero value with smaller values returned for more
> - * specific compatible values.
> - */
> -static int of_fdt_is_compatible(const void *blob,
> - unsigned long node, const char *compat)
> -{
> - const char *cp;
> - int cplen;
> - unsigned long l, score = 0;
> -
> - cp = fdt_getprop(blob, node, "compatible", &cplen);
> - if (cp == NULL)
> - return 0;
> - while (cplen > 0) {
> - score++;
> - if (of_compat_cmp(cp, compat, strlen(compat)) == 0)
> - return score;
> - l = strlen(cp) + 1;
> - cp += l;
> - cplen -= l;
> - }
> -
> - return 0;
> -}
> -
> static bool of_fdt_device_is_available(const void *blob, unsigned long node)
> {
> const char *status = fdt_getprop(blob, node, "status", NULL);
> @@ -123,27 +91,6 @@ static bool of_fdt_device_is_available(const void *blob, unsigned long node)
> return false;
> }
>
> -/**
> - * of_fdt_match - Return true if node matches a list of compatible values
> - */
> -static int __init of_fdt_match(const void *blob, unsigned long node,> - const char *const *compat)
> -{
> - unsigned int tmp, score = 0;
> -
> - if (!compat)
> - return 0;
> -
> - while (*compat) {
> - tmp = of_fdt_is_compatible(blob, node, *compat);
> - if (tmp && (score == 0 || (tmp < score)))
> - score = tmp;
> - compat++;
> - }
> -
> - return score;
> -}
> -
> static void *unflatten_dt_alloc(void **mem, unsigned long size,
> unsigned long align)
> {
> @@ -764,6 +711,59 @@ const void *__init of_get_flat_dt_prop(unsigned long node, const char *name,
> return fdt_getprop(initial_boot_params, node, name, size);
> }
>
> +/**
> + * of_fdt_is_compatible - Return true if given node from the given blob has
> + * compat in its compatible list
> + * @blob: A device tree blob
> + * @node: node to test
> + * @compat: compatible string to compare with compatible list.
> + *
> + * On match, returns a non-zero value with smaller values returned for more
> + * specific compatible values.
> + */
> +static int of_fdt_is_compatible(const void *blob,
> + unsigned long node, const char *compat)
> +{
> + const char *cp;
> + int cplen;
> + unsigned long l, score = 0;
> +
> + cp = fdt_getprop(blob, node, "compatible", &cplen);
> + if (cp == NULL)
> + return 0;
> + while (cplen > 0) {
> + score++;
> + if (of_compat_cmp(cp, compat, strlen(compat)) == 0)
> + return score;
> + l = strlen(cp) + 1;
> + cp += l;
> + cplen -= l;
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * of_fdt_match - Return true if node matches a list of compatible values
> + */
> +static int __init of_fdt_match(const void *blob, unsigned long node,
> + const char *const *compat)
> +{
> + unsigned int tmp, score = 0;
> +
> + if (!compat)
> + return 0;
> +
> + while (*compat) {
> + tmp = of_fdt_is_compatible(blob, node, *compat);
> + if (tmp && (score == 0 || (tmp < score)))
> + score = tmp;
> + compat++;
> + }
> +
> + return score;
> +}
> +
> /**
> * of_flat_dt_is_compatible - Return true if given node has compat in compatible list
> * @node: node to test
>

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