Commits on Oct 10, 2019

1. Redefine asm_inline for Linux 5.4+, Fixes iovisor#2546 …

   Here's the upstream commit that introduced `asm_inline`:
   
   * torvalds/linux@eb11186
   
   Without this patch BCC fails with the following:
   
   ```
   $ sudo /usr/share/bcc/tools/opensnoop
   In file included from /virtual/main.c:2:
   In file included from include/uapi/linux/ptrace.h:142:
   In file included from ./arch/x86/include/asm/ptrace.h:5:
   ./arch/x86/include/asm/segment.h:254:2: error: expected '(' after 'asm'
           alternative_io ("lsl %[seg],%[p]",
           ^
   ./arch/x86/include/asm/alternative.h:240:2: note: expanded from macro 'alternative_io'
           asm_inline volatile (ALTERNATIVE(oldinstr, newinstr, feature)   \
           ^
   include/linux/compiler_types.h:210:24: note: expanded from macro 'asm_inline'
                          ^
   ```

   

   bobrik committed Oct 10, 2019
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