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186f43608a
Historically a lot of these existed because we did not have a distinction between what was modular code and what was providing support to modules via EXPORT_SYMBOL and friends. That changed when we forked out support for the latter into the export.h file. This means we should be able to reduce the usage of module.h in code that is obj-y Makefile or bool Kconfig. The advantage in doing so is that module.h itself sources about 15 other headers; adding significantly to what we feed cpp, and it can obscure what headers we are effectively using. Since module.h was the source for init.h (for __init) and for export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance for the presence of either and replace as needed. Build testing revealed some implicit header usage that was fixed up accordingly. Note that some bool/obj-y instances remain since module.h is the header for some exception table entry stuff, and for things like __init_or_module (code that is tossed when MODULES=n). Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20160714001901.31603-4-paul.gortmaker@windriver.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
#include <asm/cpu_device_id.h>
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#include <asm/cpufeature.h>
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#include <linux/cpu.h>
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#include <linux/export.h>
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#include <linux/slab.h>
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/**
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* x86_match_cpu - match current CPU again an array of x86_cpu_ids
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* @match: Pointer to array of x86_cpu_ids. Last entry terminated with
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* {}.
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*
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* Return the entry if the current CPU matches the entries in the
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* passed x86_cpu_id match table. Otherwise NULL. The match table
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* contains vendor (X86_VENDOR_*), family, model and feature bits or
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* respective wildcard entries.
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*
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* A typical table entry would be to match a specific CPU
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* { X86_VENDOR_INTEL, 6, 0x12 }
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* or to match a specific CPU feature
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* { X86_FEATURE_MATCH(X86_FEATURE_FOOBAR) }
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*
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* Fields can be wildcarded with %X86_VENDOR_ANY, %X86_FAMILY_ANY,
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* %X86_MODEL_ANY, %X86_FEATURE_ANY or 0 (except for vendor)
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*
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* Arrays used to match for this should also be declared using
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* MODULE_DEVICE_TABLE(x86cpu, ...)
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*
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* This always matches against the boot cpu, assuming models and features are
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* consistent over all CPUs.
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*/
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const struct x86_cpu_id *x86_match_cpu(const struct x86_cpu_id *match)
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{
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const struct x86_cpu_id *m;
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struct cpuinfo_x86 *c = &boot_cpu_data;
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for (m = match; m->vendor | m->family | m->model | m->feature; m++) {
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if (m->vendor != X86_VENDOR_ANY && c->x86_vendor != m->vendor)
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continue;
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if (m->family != X86_FAMILY_ANY && c->x86 != m->family)
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continue;
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if (m->model != X86_MODEL_ANY && c->x86_model != m->model)
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continue;
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if (m->feature != X86_FEATURE_ANY && !cpu_has(c, m->feature))
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continue;
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return m;
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}
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return NULL;
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}
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EXPORT_SYMBOL(x86_match_cpu);
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