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[linux-3.16-rc5/arch/metag/kernel/cachepart.c:102]: (style) Checking if
unsigned variable 'thread_cache_size' is less than zero.
Source code is
if (thread_cache_size < 0)
pr_emerg("Can't read %s cache size\n",
cache_type ? "DCACHE" : "ICACHE");
but
unsigned int thread_cache_size;
Function get_thread_cache_size returns an error code
as (unsigned int) -1.
Change get_thread_cache_size() to return signed int, and its result is
stored into signed int variable.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=80361
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Andrey Utkin <andrey.krieger.utkin@gmail.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
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If the cache and page size configuration allows for cache aliasing to
occur we warn on boot, but the log messages are easy to miss and will
result is random crashes occuring in userland. Let's panic too in this
case so that the user immediately knows they need to fix the cache
configuration or configured page size.
Also fix the warning messages which display the cache and page sizes to
include newlines, and add the word "Potential" since an actual cache
alias hasn't been detected.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
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Compilation is broken when the kernel is destined to live in the global
part of the virtual address space:
arch/metag/kernel/cachepart.c In function 'get_thread_cache_size':
arch/metag/kernel/cachepart.c +71 : error: implicit declaration of function 'get_global_dache_size'
Fix the typo.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
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The CORE_CONFIG2 register has bits to indicate that the data or code
cache is small, i.e. that the size described in the field should be
divided by 64. Take this into account in get_icache_size() and
get_dcache_size().
Signed-off-by: James Hogan <james.hogan@imgtec.com>
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Add SMP support for metag. This allows Linux to take control of multiple
hardware threads on a single Meta core, treating them as separate Linux
CPUs.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
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