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Open Source and information security mailing list archives
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Date: Sun, 6 Feb 2011 00:15:58 +0000 From: Andrew Murray <amurray@...data.com> To: linux-embedded@...r.kernel.org Cc: linux kernel <linux-kernel@...r.kernel.org>, trivial@...nel.org Subject: [PATCH] printk-formats.txt documentation update From: Andrew Murray <amurray@...-data.co.uk> This patch updates the incomplete documentation concerning the printk extended format specifiers. Signed-off-by: Andrew Murray <amurray@...-data.co.uk> --- diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt index 1b5a5dd..df14336 100644 --- a/Documentation/printk-formats.txt +++ b/Documentation/printk-formats.txt @@ -9,7 +9,42 @@ If variable is of Type, use printk format specifier: size_t %zu or %zx ssize_t %zd or %zx -Raw pointer value SHOULD be printed with %p. +Raw pointer value SHOULD be printed with %p. The kernel supports +the following extended format specifiers for pointer types: + + General: + + %pF function pointer with offset, e.g. module_start + %pf function pointer without offset, e.g. module_start+0x0/0x62 [hello] + %pS text symbol with offset + %ps text symbol without offset + %pR struct resource with decoded flags, e.g. [mem 0x0-0x1f 64 bit pref] + %pr struct resource with raw flags, e.g. [mem 0x0-0x1f flags 0x201] + + MAC/FDDI addresses: + + %pM colon-seperated 6-byte MAC address in hex notation, e.g. 00:01:02:03:04:05 + %pm non-colon-seperated 6-byte MAC address is hex notation, e.g. 000102030405 + %pMF 6-byte dash-separated FDDI hex notation + + IPv4 addresses: + + %pI4 IPv4 dot-seperated decimal without leading 0's, e.g. 1.2.3.4 + %pi4 IPv4 dot-seperated decimal with leading 0's, 001.002.003.004 + %p[Ii]4[hl] IPv4 dot-seperated decimal with/without leading 0's for + host (h), little (l) or network/big (default) endian order + + IPv6 addresses: + %pI6 IPv6 colon-seperated network-order 16 bit hex with leading 0's, + e.g. 0001:0203:...:0708 + %pi6 IPv6 non-colon-seperated network-order 16 bit hex with leading 0's, + e.g. 000102...0f + %pI6c IPv6 address as described by + http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00, + e.g. 1::708 + + %pU[bBlL] 16 byte UUID/GUID in big or little endian using lower or upper case + u64 SHOULD be printed with %llu/%llx, (unsigned long long): -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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