linux-kernel - [PATCH v4 06/13] ia64: Rename 'ip' to 'addr' in 'struct fdesc'

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Date:   Tue, 15 Feb 2022 13:41:01 +0100
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "James E.J. Bottomley" <James.Bottomley@...senPartnership.com>,
        Helge Deller <deller@....de>, Arnd Bergmann <arnd@...db.de>,
        Kees Cook <keescook@...omium.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-ia64@...r.kernel.org, linux-parisc@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH v4 06/13] ia64: Rename 'ip' to 'addr' in 'struct fdesc'

There are three architectures with function descriptors, try to
have common names for the address they contain in order to
refactor some functions into generic functions later.

powerpc has 'entry'
ia64 has 'ip'
parisc has 'addr'

Vote for 'addr' and update 'struct fdesc' accordingly.

Reviewed-by: Kees Cook <keescook@...omium.org>
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/ia64/include/asm/elf.h      | 2 +-
 arch/ia64/include/asm/sections.h | 2 +-
 arch/ia64/kernel/module.c        | 6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/ia64/include/asm/elf.h b/arch/ia64/include/asm/elf.h
index 6629301a2620..2ef5f9966ad1 100644
--- a/arch/ia64/include/asm/elf.h
+++ b/arch/ia64/include/asm/elf.h
@@ -226,7 +226,7 @@ struct got_entry {
  * Layout of the Function Descriptor
  */
 struct fdesc {
-	uint64_t ip;
+	uint64_t addr;
 	uint64_t gp;
 };
 
diff --git a/arch/ia64/include/asm/sections.h b/arch/ia64/include/asm/sections.h
index 3a033d2008b3..35f24e52149a 100644
--- a/arch/ia64/include/asm/sections.h
+++ b/arch/ia64/include/asm/sections.h
@@ -35,7 +35,7 @@ static inline void *dereference_function_descriptor(void *ptr)
 	struct fdesc *desc = ptr;
 	void *p;
 
-	if (!get_kernel_nofault(p, (void *)&desc->ip))
+	if (!get_kernel_nofault(p, (void *)&desc->addr))
 		ptr = p;
 	return ptr;
 }
diff --git a/arch/ia64/kernel/module.c b/arch/ia64/kernel/module.c
index 360f36b0eb3f..8f62cf97f691 100644
--- a/arch/ia64/kernel/module.c
+++ b/arch/ia64/kernel/module.c
@@ -602,15 +602,15 @@ get_fdesc (struct module *mod, uint64_t value, int *okp)
 		return value;
 
 	/* Look for existing function descriptor. */
-	while (fdesc->ip) {
-		if (fdesc->ip == value)
+	while (fdesc->addr) {
+		if (fdesc->addr == value)
 			return (uint64_t)fdesc;
 		if ((uint64_t) ++fdesc >= mod->arch.opd->sh_addr + mod->arch.opd->sh_size)
 			BUG();
 	}
 
 	/* Create new one */
-	fdesc->ip = value;
+	fdesc->addr = value;
 	fdesc->gp = mod->arch.gp;
 	return (uint64_t) fdesc;
 }
-- 
2.34.1