parisc: Fix comment on Elf64 function descriptor

The format of the Elf64 function descriptor is defined by the ABI.
Mention the various use cases in the comment.

Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/arch/parisc/include/asm/elf.h b/arch/parisc/include/asm/elf.h
index cc426d365892b517c175928692bc44a5ebfb7a28..140eaa97bf215dcde034591222b11098f3160d0a 100644 (file)
--- a/arch/parisc/include/asm/elf.h
+++ b/arch/parisc/include/asm/elf.h
@@ -163,8 +163,7 @@ typedef struct elf32_fdesc {
 
 /* Format for the Elf64 Function descriptor */
 typedef struct elf64_fdesc {
-       __u64   dummy[2]; /* FIXME: nothing uses these, why waste
-                          * the space */
+       __u64   dummy[2]; /* used by 64-bit eBPF and tracing functions */
        __u64   addr;
        __u64   gp;
 } Elf64_Fdesc;