llext: remove LIB_MANAGER_BSS

We don't need to store .bss address and size until the module is
freed since .bss is allocated together with .data and we only need
its size when initialising it, not when freeing module memory. Remove
it to save memory.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

src/include/sof/lib_manager.h

@@ -87,7 +87,6 @@ enum {
 	LIB_MANAGER_TEXT,
 	LIB_MANAGER_DATA,
 	LIB_MANAGER_RODATA,
-	LIB_MANAGER_BSS,
 	LIB_MANAGER_N_SEGMENTS,
 };
 

src/library_manager/llext_manager.c

@@ -146,8 +146,8 @@ static int llext_manager_load_module(const struct llext *ext, const struct llext
 
 	/* .bss, should be within writable data above */
 	void __sparse_cache *bss_addr = (void __sparse_cache *)
-		ctx->segment[LIB_MANAGER_BSS].addr;
-	size_t bss_size = ctx->segment[LIB_MANAGER_BSS].size;
+		ebl->loader.sects[LLEXT_MEM_BSS].sh_addr;
+	size_t bss_size = ebl->loader.sects[LLEXT_MEM_BSS].sh_size;
 	int ret;
 
 	/* Check, that .bss is within .data */
@@ -282,13 +282,6 @@ static int llext_manager_link(struct llext_buf_loader *ebl, uintptr_t dram_base,
 	       ctx->segment[LIB_MANAGER_DATA].addr,
 	       ctx->segment[LIB_MANAGER_DATA].size);
 
-	ctx->segment[LIB_MANAGER_BSS].addr = ebl->loader.sects[LLEXT_MEM_BSS].sh_addr;
-	ctx->segment[LIB_MANAGER_BSS].size = ebl->loader.sects[LLEXT_MEM_BSS].sh_size;
-
-	tr_dbg(&lib_manager_tr, ".bss: start: %#lx size %#x",
-	       ctx->segment[LIB_MANAGER_BSS].addr,
-	       ctx->segment[LIB_MANAGER_BSS].size);
-
 	ssize_t binfo_o = llext_find_section(&ebl->loader, ".mod_buildinfo");
 
 	if (binfo_o >= 0)