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From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Ben Dooks <ben.dooks@codethink.co.uk>
Cc: linux-kernel@lists.codethink.co.uk, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] zImage: atags_to_fdt: fix __be32 and __be64 types
Date: Thu, 10 Oct 2019 17:21:04 +0100	[thread overview]
Message-ID: <20191010162104.GJ25745@shell.armlinux.org.uk> (raw)
In-Reply-To: <20191010105357.7205-1-ben.dooks@codethink.co.uk>

On Thu, Oct 10, 2019 at 11:53:57AM +0100, Ben Dooks wrote:
> There are some sparse warnings about type conversion in
> the atags_to_fdt.c code, due to __be32 and __be64, so
> fix the following:
> 
> - Change _be32 and __be64 where appropriate
> - Change setprop() to take a 'void *'
> - Change incorrect fdt32_to_cpu() on FDT_MAGIC
> 
> Fixes the following sparse warnings:
> 
> arch/arm/boot/compressed/atags_to_fdt.c:66:29: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:66:29: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:66:29: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:66:29: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:66:29: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:66:29: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:141:34: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:141:34: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:141:34: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:141:34: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:141:34: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:141:34: warning: cast to restricted __be32
> arch/arm/boot/compressed/atags_to_fdt.c:182:60: warning: incorrect type in assignment (different base types)
> arch/arm/boot/compressed/atags_to_fdt.c:182:60:    expected unsigned long long [usertype]
> arch/arm/boot/compressed/atags_to_fdt.c:182:60:    got restricted __be64 [usertype]
> arch/arm/boot/compressed/atags_to_fdt.c:184:60: warning: incorrect type in assignment (different base types)
> arch/arm/boot/compressed/atags_to_fdt.c:184:60:    expected unsigned long long [usertype]
> arch/arm/boot/compressed/atags_to_fdt.c:184:60:    got restricted __be64 [usertype]
> arch/arm/boot/compressed/atags_to_fdt.c:187:62: warning: incorrect type in assignment (different base types)
> arch/arm/boot/compressed/atags_to_fdt.c:187:62:    expected unsigned int
> arch/arm/boot/compressed/atags_to_fdt.c:187:62:    got restricted __be32 [usertype]
> arch/arm/boot/compressed/atags_to_fdt.c:189:62: warning: incorrect type in assignment (different base types)
> arch/arm/boot/compressed/atags_to_fdt.c:189:62:    expected unsigned int
> arch/arm/boot/compressed/atags_to_fdt.c:189:62:    got restricted __be32 [usertype]
> 
> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
> ---
> KernelVersion: 5.4-rc2
> ---
> Cc: Russell King <linux@armlinux.org.uk>
> Cc: linux-arm-kernel@lists.infradead.org
> 
> Changes since v1:
> - Fix setprop() type to void *
> - Fix ftd32_to_cpu on FDT_MAGIC
> ---
>  arch/arm/boot/compressed/atags_to_fdt.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/arch/arm/boot/compressed/atags_to_fdt.c b/arch/arm/boot/compressed/atags_to_fdt.c
> index 330cd3c2eae5..cd889f19c8a3 100644
> --- a/arch/arm/boot/compressed/atags_to_fdt.c
> +++ b/arch/arm/boot/compressed/atags_to_fdt.c
> @@ -19,7 +19,7 @@ static int node_offset(void *fdt, const char *node_path)
>  }
>  
>  static int setprop(void *fdt, const char *node_path, const char *property,
> -		   uint32_t *val_array, int size)
> +		   void *val_array, int size)
>  {
>  	int offset = node_offset(fdt, node_path);
>  	if (offset < 0)
> @@ -60,7 +60,7 @@ static uint32_t get_cell_size(const void *fdt)
>  {
>  	int len;
>  	uint32_t cell_size = 1;
> -	const uint32_t *size_len =  getprop(fdt, "/", "#size-cells", &len);
> +	const __be32 *size_len =  getprop(fdt, "/", "#size-cells", &len);
>  
>  	if (size_len)
>  		cell_size = fdt32_to_cpu(*size_len);
> @@ -129,7 +129,7 @@ int atags_to_fdt(void *atag_list, void *fdt, int total_space)
>  	struct tag *atag = atag_list;
>  	/* In the case of 64 bits memory size, need to reserve 2 cells for
>  	 * address and size for each bank */
> -	uint32_t mem_reg_property[2 * 2 * NR_BANKS];
> +	__be32 mem_reg_property[2 * 2 * NR_BANKS];
>  	int memcount = 0;
>  	int ret, memsize;
>  
> @@ -138,7 +138,7 @@ int atags_to_fdt(void *atag_list, void *fdt, int total_space)
>  		return 1;
>  
>  	/* if we get a DTB here we're done already */
> -	if (*(u32 *)atag_list == fdt32_to_cpu(FDT_MAGIC))
> +	if (*(__be32 *)atag_list == cpu_to_fdt32(FDT_MAGIC))
>  	       return 0;
>  
>  	/* validate the ATAG */
> @@ -177,8 +177,8 @@ int atags_to_fdt(void *atag_list, void *fdt, int total_space)
>  				/* if memsize is 2, that means that
>  				 * each data needs 2 cells of 32 bits,
>  				 * so the data are 64 bits */
> -				uint64_t *mem_reg_prop64 =
> -					(uint64_t *)mem_reg_property;
> +				__be64 *mem_reg_prop64 =
> +					(__be64 *)mem_reg_property;
>  				mem_reg_prop64[memcount++] =
>  					cpu_to_fdt64(atag->u.mem.start);
>  				mem_reg_prop64[memcount++] =
> @@ -207,7 +207,7 @@ int atags_to_fdt(void *atag_list, void *fdt, int total_space)
>  	}
>  
>  	if (memcount) {
> -		setprop(fdt, "/memory", "reg", mem_reg_property,
> +		setprop(fdt, "/memory", "reg", (uint32_t *)mem_reg_property,

As setprop() now takes a void pointer argument, do you need this cast?

>  			4 * memcount * memsize);
>  	}
>  
> -- 
> 2.23.0
> 
> 

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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  parent reply	other threads:[~2019-10-10 16:21 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-10 10:53 [PATCH] zImage: atags_to_fdt: fix __be32 and __be64 types Ben Dooks
2019-10-10 10:56 ` Ben Dooks
2019-10-10 16:21 ` Russell King - ARM Linux admin [this message]
2019-10-11 10:21   ` Ben Dooks
  -- strict thread matches above, loose matches on Subject: below --
2019-10-09 16:01 Ben Dooks
2019-10-09 16:24 ` Russell King - ARM Linux admin
2019-10-10  8:06   ` Ben Dooks

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