linux-kernel - Re: [PATCH v2 2/3] lib/vsprintf: Add support for generic FOURCCs by extending %p4cc

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Message-ID: <4DA18DF6-4C41-4D45-9DD4-B82E043B3320@live.com>
Date: Sun, 23 Feb 2025 15:16:28 +0000
From: Aditya Garg <gargaditya08@...e.com>
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Subject: Re: [PATCH v2 2/3] lib/vsprintf: Add support for generic FOURCCs by
 extending %p4cc


> 
> Looking at the header files, it looks like doing cpu_to_le32 on that variable and doing le32_to_cpu will actually reverse the order twice, on big endian systems, thus technically all way would not swap the order at all.
> 
> I'm not really sure how to manage the sparse warnings here.



Not sure whether the maintainers would like it, but we can do something like this:

	case 'l’:
#ifdef __LITTLE_ENDIAN
		val = orig;
#else
		orig = swab32(orig);
		val = orig;
#endif
		break;

	case 'b’:
#ifdef __LITTLE_ENDIAN
		orig = swab32(orig);
		val = orig;
#else
		val = orig;
#endif
		break;