RE: [PATCH v2 4/7] lib/hexdump.c: Replace ascii bool in hex_dump_to_buffer with flags
From: David Laight <hidden>
Date: 2019-05-08 09:19:59
Also in:
dri-devel, intel-gfx, linux-fsdevel, linux-scsi, linux-wireless, lkml, netdev
From: Alastair D'Silva
Sent: 08 May 2019 08:02 To: alastair@d-silva.org
...
quoted hunk ↗ jump to hunk
--- a/include/linux/printk.h +++ b/include/linux/printk.h@@ -480,13 +480,13 @@ enum { DUMP_PREFIX_OFFSET }; -extern int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, - int groupsize, char *linebuf, size_t linebuflen, - bool ascii); - #define HEXDUMP_ASCII (1 << 0) #define HEXDUMP_SUPPRESS_REPEATED (1 << 1)
These ought to be BIT(0) and BIT(1)
+extern int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, + int groupsize, char *linebuf, size_t linebuflen, + u64 flags);
Why 'u64 flags' ? How many flags do you envisage ?? Your HEXDUMP_ASCII (etc) flags are currently signed values and might get sign extended causing grief. 'unsigned int flags' is probably sufficient. I've not really looked at the code, it seems OTT in places though. If someone copies it somewhere where the performance matters (I've user space code which is dominated by its tracing!) then you don't want all the function calls and conditionals even if you want some of the functionality. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)