[llvm] [llvm-profgen] Add support for Linux kenrel profile (PR #92831)

[via llvm-commits]

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@@ -56,6 +56,10 @@ static cl::list<std::string> DisassembleFunctions(
     cl::desc("List of functions to print disassembly for. Accept demangled "
              "names only. Only work with show-disassembly-only"));
 
+static cl::opt<bool>
+    KernelBinary("kernel",
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WenleiHe wrote:

> If the user passes a wrong binary image, most like they won't get a profile because of the symbol and address mismatch.

Maybe useful to error out if kernel is requested but binary is not kernel? 

https://github.com/llvm/llvm-project/pull/92831