The branch profiling creates very complex code for each if
statement, to the point that gcc has trouble even analyzing
something as simple as
if (count > 5)
count = 5;
This then means that causing an error on code that gcc cannot
analyze for copy_from_user() and co is not very productive.
This patch excludes the strict copy checks in the case of branch
profiling being enabled.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <
20091006070452.
5e1fc119@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
config DEBUG_STRICT_USER_COPY_CHECKS
bool "Strict copy size checks"
- depends on DEBUG_KERNEL
+ depends on DEBUG_KERNEL && !TRACE_BRANCH_PROFILING
---help---
Enabling this option turns a certain set of sanity checks for user
copy operations into compile time failures.