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authorJoe Perches <joe@perches.com>2014-01-23 15:54:17 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 16:36:56 -0800
commitaaf07621b8bbfdc0d87e9e5dbf1af3b24304998a (patch)
tree0b6b96f278a12b3dc5bcc46217ea8f0d54098d14 /Documentation/printk-formats.txt
parentc28aa1f0a847c36daa4280b611e2b54bad75c576 (diff)
downloadkernel-aaf07621b8bbfdc0d87e9e5dbf1af3b24304998a.tar.gz
vsprintf: add %pad extension for dma_addr_t use
dma_addr_t's can be either u32 or u64 depending on a CONFIG option. There are a few hundred dma_addr_t's printed via either cast to unsigned long long, unsigned long or no cast at all. Add %pad to be able to emit them without the cast. Update Documentation/printk-formats.txt too. Signed-off-by: Joe Perches <joe@perches.com> Cc: "Shevchenko, Andriy" <andriy.shevchenko@intel.com> Cc: Rob Landley <rob@landley.net> Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Cc: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/printk-formats.txt')
-rw-r--r--Documentation/printk-formats.txt11
1 files changed, 9 insertions, 2 deletions
diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt
index 445ad743ec81..6f4eb322ffaf 100644
--- a/Documentation/printk-formats.txt
+++ b/Documentation/printk-formats.txt
@@ -55,14 +55,21 @@ Struct Resources:
For printing struct resources. The 'R' and 'r' specifiers result in a
printed resource with ('R') or without ('r') a decoded flags member.
-Physical addresses:
+Physical addresses types phys_addr_t:
- %pa 0x01234567 or 0x0123456789abcdef
+ %pa[p] 0x01234567 or 0x0123456789abcdef
For printing a phys_addr_t type (and its derivatives, such as
resource_size_t) which can vary based on build options, regardless of
the width of the CPU data path. Passed by reference.
+DMA addresses types dma_addr_t:
+
+ %pad 0x01234567 or 0x0123456789abcdef
+
+ For printing a dma_addr_t type which can vary based on build options,
+ regardless of the width of the CPU data path. Passed by reference.
+
Raw buffer as a hex string:
%*ph 00 01 02 ... 3f
%*phC 00:01:02: ... :3f