build-llvm.py: Use Linux 6.19 tarball from mainline repository

This will make it easier to test prerelease versions.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>

Author: nathanchance

build-llvm.py

@@ -33,9 +33,6 @@
 # This is a known good revision of LLVM for building the kernel
 GOOD_REVISION = '2a2a394215b38631588d504d2b671df13370395b'
 
-# The version of the Linux kernel that the script downloads if necessary
-DEFAULT_KERNEL_FOR_PGO = (6, 19, 0)
-
 parser = ArgumentParser(formatter_class=RawTextHelpFormatter)
 clone_options = parser.add_mutually_exclusive_group()
 opt_options = parser.add_mutually_exclusive_group()
@@ -546,14 +543,11 @@
                 f"Supplied kernel source version ('{found_version}') is older than the minimum required version ('{minimum_version}'), provide a newer version!"
             )
     else:
-        # Turns (6, 2, 0) into 6.2 and (6, 2, 1) into 6.2.1 to follow tarball names
-        ver_str = '.'.join(str(x) for x in DEFAULT_KERNEL_FOR_PGO if x)
-        lsm.location = Path(src_folder, f"linux-{ver_str}")
+        lsm.location = Path(src_folder, 'linux-6.19')
         lsm.patches = list(src_folder.glob('*.patch'))
 
-        lsm.tarball.base_download_url = 'https://cdn.kernel.org/pub/linux/kernel/v6.x'
-        lsm.tarball.local_location = lsm.location.with_name(f"{lsm.location.name}.tar.xz")
-        lsm.tarball.remote_checksum_name = 'sha256sums.asc'
+        lsm.tarball.base_download_url = 'https://git.kernel.org/torvalds/t'
+        lsm.tarball.local_location = lsm.location.with_name(f"{lsm.location.name}.tar.gz")
 
         tc_build.utils.print_header('Preparing Linux source for profiling runs')
         lsm.prepare()