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doc: module: DEFAULT_SYMBOL_NAMESPACE must be defined before #includes

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The definition of EXPORT_SYMBOL et al depends on
DEFAULT_SYMBOL_NAMESPACE. So DEFAULT_SYMBOL_NAMESPACE must already be
available when <linux/export.h> is parsed.

Also when defined that early there is no need for an #undef, so drop
that from the usage example.

Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/linux-i2c/Z09bp9uMzwXRLXuF@smile.fi.intel.com/
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://lore.kernel.org/r/3dd7ff6fa0a636de86e091286016be8c90e03631.1733305665.git.ukleinek@kernel.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20241230142357.3203913-6-u.kleine-koenig@baylibre.com
This commit is contained in:
Uwe Kleine-König 2024-12-30 15:24:00 +01:00 committed by Jonathan Corbet
parent 3008178ef3
commit fcf22a957f
1 changed files with 2 additions and 3 deletions
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5
Documentation/core-api/symbol-namespaces.rst
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@ -78,11 +78,10 @@ as this argument has preference over a default symbol namespace.
A second option to define the default namespace is directly in the compilation
unit as preprocessor statement. The above example would then read::
#undef DEFAULT_SYMBOL_NAMESPACE
#define DEFAULT_SYMBOL_NAMESPACE "USB_COMMON"
within the corresponding compilation unit before any EXPORT_SYMBOL macro is
used.
within the corresponding compilation unit before the #include for
<linux/export.h>. Typically it's placed before the first #include statement.
3. How to use Symbols exported in Namespaces
============================================